作为成长的记忆，也作为不断追求卓越的见证，分享自己工作一年来的优秀代码片段。
思考：两年，三年，甚至更远，进步能有几何???
期望：年年岁岁花相似，岁岁年年码不同~
/**
* Comprehensive Assert API, for extensible ,you can use inheritance machanism,
* naming your class as Assert2 or AssertUtils and so on.
*
* <pre>
* notice: I strongly recommend the isTrue method,very versatile.
* </pre>
*
* @see com.biz.service.util.ToolKits
* @author vongosling
*/
public abstract class Assert {
/**
* Assert that an object is <code>null</code> .
*
* <pre class="code">
* Assert.isNull(value, "The value must be null");
* </pre>
*
* @param object the object to check
* @param message the exception message to use if the assertion fails
* @throws IllegalArgumentException if the object is not <code>null</code>
*/
public static void isNull(Object object, String message) {
if (object != null) {
throw new IllegalArgumentException(message);
}
}
/**
* Assert that an object is <code>null</code> .
*
* <pre class="code">
* Assert.isNull(value);
* </pre>
*
* @param object the object to check
* @throws IllegalArgumentException if the object is not <code>null</code>
*/
public static void isNull(Object object) {
isNull(object, "the argument must be null");
}
/**
* Assert that an object is not <code>null</code> .
*
* <pre class="code">
* Assert.notNull(clazz, "The class must not be null");
* </pre>
*
* @param object the object to check
* @param message the exception message to use if the assertion fails
* @throws IllegalArgumentException if the object is <code>null</code>
*/
public static void notNull(Object object, String message) {
if (object == null) {
throw new IllegalArgumentException(message);
}
}
/**
* Assert that an object is not <code>null</code> .
*
* <pre class="code">
* Assert.notNull(clazz);
* </pre>
*
* @param object the object to check
* @throws IllegalArgumentException if the object is <code>null</code>
*/
public static void notNull(Object object) {
notNull(object, "this argument is required; it must not be null");
}
/**
* Assert that the given String is not empty; that is, it must not be
* <code>null</code> and not the empty String.
*
* <pre class="code">
* Assert.hasLength(name, "Name must not be empty");
* </pre>
*
* @param text the String to check
* @param message the exception message to use if the assertion fails
*/
public static void hasLength(String text, String message) {
if (text == null || "".equals(text.trim())) {
throw new IllegalArgumentException(message);
}
}
/**
* Assert that the given String is not empty; that is, it must not be
* <code>null</code> and not the empty String.
*
* <pre class="code">
* Assert.hasLength(name);
* </pre>
*
* @param text the String to check
*/
public static void hasLength(String text) {
hasLength(text, "this String argument must have length; it must not be null or empty");
}
/**
* Assert that a collection has elements; that is, it must not be
* <code>null</code> and must have at least one element.
*
* <pre class="code">
* Assert.notEmpty(collection, "Collection must have elements");
* </pre>
*
* @param collection the collection to check
* @param message the exception message to use if the assertion fails
* @throws IllegalArgumentException if the collection is <code>null</code>
* or has no elements
*/
public static <T> void notEmpty(Collection<T> collection, String message) {
if (collection == null || collection.isEmpty()) {
throw new IllegalArgumentException(message);
}
}
/**
* Assert that a collection has elements; that is, it must not be
* <code>null</code> and must have at least one element.
*
* <pre class="code">
* Assert.notEmpty(collection, "Collection must have elements");
* </pre>
*
* @param collection the collection to check
* @throws IllegalArgumentException if the collection is <code>null</code>
* or has no elements
*/
public static <T> void notEmpty(Collection<T> collection) {
notEmpty(collection,
"this collection must not be empty: it must contain at least 1 element");
}
/**
* Assert that a map has elements; that is, it must not be <code>null</code>
* and must have at least one element.
*
* <pre class="code">
* Assert.notEmpty(map, "Map must have elements");
* </pre>
*
* @param map the Map to check
* @return whether the given Map is empty
* @throws IllegalArgumentException if the map is <code>null</code> or has
* no elements
*/
public static <T, K> void notEmpty(Map<T, K> map, String message) {
if (map == null || map.isEmpty()) {
throw new IllegalArgumentException(message);
}
}
/**
* Assert that a Map has entries; that is, it must not be <code>null</code>
* and must have at least one entry.
*
* <pre class="code">
* Assert.notEmpty(map);
* </pre>
*
* @param map the map to check
* @throws IllegalArgumentException if the map is <code>null</code> or has
* no entries
*/
public static <T, K> void notEmpty(Map<T, K> map) {
notEmpty(map, "this map must not be empty; it must contain at least one entry");
}
/**
* Assert that the given String is not empty.
*
* <pre class="code">
* Assert.notEmpty(name, "Name must not be empty");
* </pre>
*
* @param text the sting to check
* @param message the exception message to use if the assertion fails
* @throws IllegalArgumentException if the string is empty.
* @see #hasLength
*/
public static void notEmpty(String text, String message) {
hasLength(text, message);
}
/**
* Assert that an array has elements; that is, it must not be
* <code>null</code> and must have at least one element.
*
* <pre class="code">
* Assert.notEmpty(array, "The array must have elements");
* </pre>
*
* @param array the array to check
* @param message the exception message to use if the assertion fails
* @throws IllegalArgumentException if the object array is <code>null</code>
* or has no elements
*/
public static void notEmpty(Object[] array, String message) {
if (array == null || array.length == 0) {
throw new IllegalArgumentException(message);
}
}
/**
* Assert that an array has elements; that is, it must not be
* <code>null</code> and must have at least one element.
*
* <pre class="code">
* Assert.notEmpty(array);
* </pre>
*
* @param array the array to check
* @throws IllegalArgumentException if the object array is <code>null</code>
* or has no elements
*/
public static void notEmpty(Object[] array) {
notEmpty(array, "this array must not be empty: it must contain at least 1 element");
}
/**
* Assert that an array has no null elements.
*
* <pre class="code">
* Assert.noNullElements(array, "The array must have non-null elements");
* </pre>
*
* @param array the array to check
* @param message the exception message to use if the assertion fails
* @throws IllegalArgumentException if the object array contains a
* <code>null</code> element
*/
public static void noNullElements(Object[] array, String message) {
notEmpty(array);
for (int i = 0; i < array.length; i++) {
if (array[i] == null) {
throw new IllegalArgumentException(message);
}
}
}
/**
* Assert that an array has no null elements. Note: Does not complain if the
* array is empty!
*
* <pre class="code">
* Assert.noNullElements(array);
* </pre>
*
* @param array the array to check
* @throws IllegalArgumentException if the object array contains a
* <code>null</code> element
*/
public static void noNullElements(Object[] array) {
noNullElements(array, "this array must not contain any null elements");
}
/**
* Assert that an collection has no null elements.
*
* <pre class="code">
* Assert.noNullElements(collection, "The collection must have non-null elements");
* </pre>
*
* @param collection the collection to check
* @param message the exception message to use if the assertion fails
* @throws IllegalArgumentException if the collection contains a
* <code>null</code> element
*/
public static <T> void noNullElements(Collection<T> collection, String message) {
notEmpty(collection);
for (Iterator<T> it = collection.iterator(); it.hasNext();) {
if (it.next() == null) {
throw new IllegalArgumentException(message);
}
}
}
/**
* Assert that an collection has no null elements.
*
* <pre class="code">
* Assert.noNullElements(collection);
* </pre>
*
* @param collection the collection to check
* @param message the exception message to use if the assertion fails
* @throws IllegalArgumentException if the collection contains a
* <code>null</code> element
*/
public static <T> void noNullElements(Collection<T> collection) {
notEmpty(collection);
int i = 0;
for (Iterator<T> it = collection.iterator(); it.hasNext(); i++) {
if (it.next() == null) {
throw new IllegalArgumentException(
"The validated collection contains null element at index: " + i);
}
}
}
/**
* Assert the less than operation validity.
*
* <pre class="code">
* Assert.lessThan(number, compareNumber, "number must be less Than compareNumber");
* </pre>
*
* @param number
* @param compareNumber
* @param message
*/
public static void lessThan(Number number, Number compareNumber, String message) {
if (number == null || compareNumber == null) {
throw new IllegalArgumentException("one of the arguments is null");
}
if (number.longValue() > compareNumber.longValue()) {
throw new IllegalArgumentException(message);
}
}
/**
* Assert the less than operation validity.
*
* <pre class="code">
* Assert.lessThan(number, compareNumber);
* </pre>
*
* @param number
* @param compareNumber
* @param message
*/
public static void lessThan(Number number, Number compareNumber) {
if (number == null || compareNumber == null) {
throw new IllegalArgumentException("one of the arguments is null");
}
if (number.longValue() > compareNumber.longValue()) {
throw new IllegalArgumentException("less than operation not satisfied");
}
}
/**
* Assert the more than operation validity.
*
* <pre class="code">
* Assert.moreThan(number, compareNumber, "number must be more Than compareNumber");
* </pre>
*
* @param number
* @param compareNumber
* @param message
*/
public static void moreThan(Number number, Number compareNumber, String message) {
if (number == null || compareNumber == null) {
throw new IllegalArgumentException("one of the arguments is null");
}
if (number.longValue() < compareNumber.longValue()) {
throw new IllegalArgumentException(message);
}
}
/**
* Assert the more than operation validity.
*
* <pre class="code">
* Assert.moreThan(number, compareNumber);
* </pre>
*
* @param number
* @param compareNumber
* @param message
*/
public static void moreThan(Number number, Number compareNumber) {
if (number == null || compareNumber == null) {
throw new IllegalArgumentException("one of the arguments is null");
}
if (number.longValue() < compareNumber.longValue()) {
throw new IllegalArgumentException("more than operation not satisfied");
}
}
/**
* Assert that the provided object is an instance of the provided class.
*
* <pre class="code">
* Assert.instanceOf(Foo.class, foo);
* </pre>
*
* @param clazz the required class
* @param obj the object to check
* @throws IllegalArgumentException if the object is not an instance of
* clazz
* @see Class#isInstance
*/
public static <T> void isInstanceOf(Class<T> clazz, Object obj) {
isInstanceOf(clazz, obj, "");
}
/**
* Assert that the provided object is an instance of the provided class.
*
* <pre class="code">
* Assert.instanceOf(Foo.class, foo, "object must be an instance of class Foo");
* </pre>
*
* @param type the type to check against
* @param obj the object to check
* @param message a message which will be prepended to the message produced
* by the function itself, and which may be used to provide
* context. It should normally end in a ": " or ". " so that the
* function generate message looks ok when prepended to it.
* @throws IllegalArgumentException if the object is not an instance of
* clazz
* @see Class#isInstance
*/
public static <T> void isInstanceOf(Class<T> type, Object obj, String message) {
notNull(type, "Type to check must not be null");
if (!type.isInstance(obj)) {
throw new IllegalArgumentException(message + "Object of class ["
+ (obj != null ? obj.getClass().getName() : "null")
+ "] must be an instance of " + type);
}
}
/**
* Assert that <code>superType.isAssignableFrom(subType)</code> is
* <code>true</code>.
*
* <pre class="code">
* Assert.isAssignable(Number.class, myClass);
* </pre>
*
* @param superType the super type to check
* @param subType the sub type to check
* @throws IllegalArgumentException if the classes are not assignable
*/
public static <T, P> void isAssignable(Class<T> superType, Class<P> subType) {
isAssignable(superType, subType, "");
}
/**
* Assert that <code>superType.isAssignableFrom(subType)</code> is
* <code>true</code>.
*
* <pre class="code">
* Assert.isAssignable(Number.class, myClass, "subType must be assignable to superType");
* </pre>
*
* @param superType the super type to check against
* @param subType the sub type to check
* @param message a message which will be prepended to the message produced
* by the function itself, and which may be used to provide
* context. It should normally end in a ": " or ". " so that the
* function generate message looks ok when prepended to it.
* @throws IllegalArgumentException if the classes are not assignable
*/
public static <T, P> void isAssignable(Class<T> superType, Class<P> subType, String message) {
notNull(superType, "Type to check against must not be null");
if (subType == null || !superType.isAssignableFrom(subType)) {
throw new IllegalArgumentException(message + subType + " is not assignable to "
+ superType);
}
}
/**
* Assert a boolean expression, throwing
* <code>IllegalArgumentException</code> if the test result is
* <code>false</code>.
*
* <pre class="code">
* Assert.isTrue(i > 0, "The value must be greater than zero");
* </pre>
*
* @param expression a boolean expression
* @param message the exception message to use if the assertion fails
* @throws IllegalArgumentException if expression is <code>false</code>
*/
public static void isTrue(boolean expression, String message) {
if (!expression) {
throw new IllegalArgumentException(message);
}
}
/**
* Assert a boolean expression, throwing
* <code>IllegalArgumentException</code> if the test result is
* <code>false</code>.
*
* <pre class="code">
* Assert.isTrue(i > 0);
* </pre>
*
* @param expression a boolean expression
* @throws IllegalArgumentException if expression is <code>false</code>
*/
public static void isTrue(boolean expression) {
isTrue(expression, "this expression must be true");
}
}
/**
* ToolKits,dedicated to XXX project
*
* @author vongosling
*/
public class ToolKits {
private static ToolKits instance;
private static Object o = ToolKits.class;
private ToolKits() {
}
static {
synchronized (o) {
if (instance == null) {
instance = new ToolKits();
}
}
}
/**
* @return {@code ToolKits singleton instance}
*/
public static ToolKits getInstance() {
return instance;
}
/**
* Return <code>true</code> if the supplied Collection is <code>null</code>
* or empty. Otherwise, return <code>false</code>.
*
* @param collection the Collection to check
* @return whether the given Collection is empty
*/
public static <T> boolean checkCollection(Collection<T> collection) {
return collection == null || collection.isEmpty();
}
/**
* Return <code>true</code> if the supplied Map is <code>null</code> or
* empty. Otherwise, return <code>false</code>.
*
* @param map the Map to check
* @return whether the given Map is empty
*/
public static <T, K> boolean checkMap(Map<T, K> map) {
return map == null || map.isEmpty();
}
/**
* Returns a new {@link Collection} containing <tt><i>a</i> - <i>b</i></tt>.
* The cardinality of each element <i>e</i> in the returned
* {@link Collection} will be the cardinality of <i>e</i> in <i>a</i> minus
* the cardinality of <i>e</i> in <i>b</i>, or zero, whichever is greater.
*
* @param a the collection to subtract from, must not be null
* @param b the collection to subtract, must not be null
* @return a new collection with the results
* @see Collection#removeAll
*/
public static <T> Collection<T> subtract(final Collection<T> a, final Collection<T> b) {
ArrayList<T> list = new ArrayList<T>(a);
for (Iterator<T> it = b.iterator(); it.hasNext();) {
list.remove(it.next());
}
return list;
}
/**
* Ensures that object references passed as a parameter to the calling
* method are all not empty(include null). necessarily , when reference
* refers to Collection,its size can not empty.
*
* @param elements the elements that the checker should precondition, in
* order
* @return <p>
* <b>false</b> if one of the variable parameters is null or is
* empty.
*/
@SuppressWarnings("unchecked")
public static <T> boolean anyOneIsNotEmpty(T... elements) {
if (elements == null) {
return false;
}
if (elements.length == 1 && elements instanceof String[]) {
return (elements != null) && (((String) elements[0]).trim().length() != 0);
}
for (T obj : elements) {
if (obj == null) {
return false;
}
if (obj instanceof String) {
if (((String) obj).trim().length() == 0) {
return false;
} else {
continue;
}
} else if (obj instanceof Collection) {
if (((Collection) obj).isEmpty()) {
return false;
} else {
continue;
}
} else if (obj instanceof Map) {
if (((Map) obj).isEmpty()) {
return false;
} else {
continue;
}
}else{
//fault-tolerant
return true;
}
}
return true;
}
/**
* Cache client adatper
*
* @see https://github.com/memcached/memcached/blob/master/doc/protocol.txt
* @author vongosling
*/
public interface CacheClientAdapter {
/**
* Store this data, only if it does not already exist. New items are at the
* top of the LRU. If an item already exists and an add fails, it promotes
* the item to the front of the LRU anyway.
*
* @param <T>
* @param key
* @param exp
* @param value
* @return
*/
<T> boolean add(String key, int exp, T value);
/**
* Store this data, possibly overwriting any existing data. New items are at
* the top of the LRU.
*
* @param <T>
* @param key
* @param exp
* @param value
* @return
*/
<T> boolean set(String key, int exp, T value);
/**
* Retrieving data. Takes one keys and returns the found item.
*
* @param <T>
* @param key
* @return
*/
<T> T get(String key);
/**
* Retrieving data. Takes more keys and returns all found items.
*
* @param <T>
* @param keyCollections
* @return
*/
<T> Map<String, T> get(Collection<String> keyCollections);
/**
* Removes an item from the cache, if it exists.
*
* @param key
* @return
*/
boolean delete(String key);
/**
* Increment and Decrement. If an item stored is the string representation
* of a 64bit integer, you may run incr or decr commands to modify that
* number. You can incr by positive or negative values, so decr is included
* for completeness. If a value does not already exist, incr/decr will fail.
*
* @param key
* @param step
* @return
*/
long incr(String key, int step);
/**
* @see {@link #incr}
* @param key
* @param step
* @return
*/
long decr(String key, int step);
/**
* wthether the cache switch is open
*
* @return
*/
boolean isEnable();
/**
* @param enable
*/
void setEnable(boolean enable);
/**
* Basic stats command
*
* @return
*/
Map<InetSocketAddress, Map<String, String>> getStats();
/**
* Stats command Materialization,such as: </br> stats items|stats
* slabs|stats sizes
*
* @param itemName {@literal items|slabs|sizes}
* @return
*/
Map<InetSocketAddress, Map<String, String>> getStatsByItem(String itemName);
/**
* @throws IOException
*/
void shutdown() throws IOException;
}
private boolean checkIsInBlackList(JSONObject result) {
//1. special case1
if (result == null || "{}".equals(result.toJSONString()))
return false;
//2. special case2
if (!"200".equals(result.getString("respCode"))) {
logger.warn("warning,please refer to {} and concult 360 platform.", result);
return false;
}
//3. in blacklist or in Must blacklist or ACP(exclude whitelist)?
try {
JSONObject JsonObj = result.getJSONObject("content").getJSONObject("blackCustomerInfo")
.getJSONObject("returnValue");
//FIXME too deep when I get what I wanted,trace 360 platform improvement...
String value = JsonObj.getString(getFields());
if (value.contains("1") || value.contains("2")
|| value.matches("((([#]|[\\s])5)|(5))[^(_inactive)]*")) {
return true;
}
} catch (Exception e) {
logger.error("Error occur!", e);
return false;
}
return false;
}
/**
* @author vongosling
*/
public interface IVisitor {
String getVisitorKey();
void visit(CustomerParam customerParam);
}
/**
* @author vongosling
*/
public abstract class AbstractVisitor implements IVisitor {
protected final Logger log = LoggerFactory.getLogger(AbstractVisitor.class);
public final void visit(CustomerParam customerParam) {
this.init(customerParam);
}
public String getVisitorKey() {
return this.getClass().getSimpleName();
}
protected abstract void init(CustomerParam customerParam);
}
/**
* Holder pattern
*
* @author vongosling
*/
public class VisitorHolder {
private static final Logger LOG = LoggerFactory.getLogger(VisitorHolder.class);
private Map<String, IVisitor> holder = Maps.newHashMap();
private List<IVisitor> visitorList;
public IVisitor getVisitor(String key) {
if (StringUtils.isBlank(key)) {
return null;
}
return holder.get(key);
}
public void setVisitorList(List<IVisitor> visitorList) {
holder.clear();
this.visitorList = visitorList;
for (IVisitor visitor : visitorList) {
holder.put(visitor.getVisitorKey(), visitor);
}
}
public Map<String, IVisitor> getHolder() {
return holder;
}
public void setHolder(Map<String, IVisitor> holder) {
this.holder = holder;
LOG.info("load visitor {}", holder);
}
public List<IVisitor> getVisitorList() {
return visitorList;
}
}
/**
* 如果正常拼接后得到的key转换为bytes的长度超过250（memcached的key长度上限）， 则自动做一次sha256hex的转换。
*
* @param cacheDomain 缓存的domain
* @param valueId 缓存内容的主键
* @param version 版本
* @return
* @see CacheDomain
*/
public static String getKey(CacheDomain cacheDomain, String valueId, int version) {
String key = cacheDomain.getValue() + SPLIT + valueId + SPLIT + version;
final byte[] bytes = key.getBytes();
if (bytes.length > 250) {
key = DigestUtils.sha256Hex(key);
}
return key;
}
/**
* @author vongosling
*/
@ManagedResource(objectName = CacheClientMBean.MBEAN_NAME, description = "Cache Management Bean")
@SuppressWarnings("deprecation")
public class CacheClientMBean {
private static final Logger LOG = LoggerFactory.getLogger(CacheClientMBean.class);
public static final String MBEAN_NAME = "XXX:type=CacheClientMBean,name=cacheClientMBean";
private CacheClientAdapter cacheClientAdapter;
private MemcachedClient memcachedClient;
@ManagedAttribute(description = "Current active session host")
public Set<String> getActiveSessionHost() {
Set<Session> sessions = memcachedClient.getConnector().getSessionSet();
Set<String> hosts = Sets.newHashSet();
for (Session ses : sessions) {
hosts.add(ses.toString());
}
return hosts;
}
@ManagedAttribute(description = "Order Cache Version")
public Integer getOrderCacheVersion() {
String key = CacheDomain.ORDERITEM.getValue() + OrderCacheServiceBo.KEY_SPLIT
+ OrderCacheServiceBo.ORDER_CACHE_VERSION;
LOG.debug("Order cache version key is {}", key);
return cacheClientAdapter.get(key);
}
@ManagedAttribute(description = "Order Cache Black Version")
public Integer getOrderBlackListCacheVersion() {
String key = CacheDomain.ORDERITEM.getValue() + OrderCacheServiceBo.KEY_SPLIT
+ OrderCacheServiceBo.ORDER_BLACK_LIST_VERSION;
return cacheClientAdapter.get(key);
}
@ManagedAttribute(description = "Product Cache Version")
public Integer getPrdCacheVersion() {
return cacheClientAdapter.get(PrdServiceCacheAdmin.PRDCONFIG_CACHE_VESION_KEY);
}
@SuppressWarnings("unchecked")
@ManagedOperation(description = "Get value from memcached")
@ManagedOperationParameters( { @ManagedOperationParameter(name = "key", description = "Cache Key") })
public String getValueFromCache(String key) {
Object o = cacheClientAdapter.get(key);
String s = null;
if (o instanceof Map) {
s = o.toString();
} else {
s = ToStringBuilder.reflectionToString(o, ToStringStyle.MULTI_LINE_STYLE);
}
return s;
}
public void setCacheClientAdapter(CacheClientAdapter cacheClientAdapter) {
this.cacheClientAdapter = cacheClientAdapter;
}
public MemcachedClient getMemcachedClient() {
return memcachedClient;
}
public void setMemcachedClient(MemcachedClient memcachedClient) {
this.memcachedClient = memcachedClient;
}
}
/**
* @author vongosling
*/
public interface LoggingConfig {
/**
* @param filter returns only loggers, which contain the filter string
* @return all available loggers
*/
public String[] getLoggers(String filter);
/**
* assigns the {@link Level#INFO} to the given class
*
* @param target the FQCN of the class
*/
public void assignInfoLevel(String target);
/**
* assigns the {@link Level#WARN} to the given class
*
* @param target the FQCN of the class
*/
public void assignWarnLevel(String target);
/**
* assigns the {@link Level#ERROR} to the given class
*
* @param target the FQCN of the class
*/
public void assignErrorLevel(String target);
/**
* assigns the {@link Level#DEBUG} to the given class
*
* @param target the FQCN of the class
*/
public void assignDebug(String target);
/**
* assigns the {@link Level#FATAL} to the given class
*
* @param target the FQCN of the class
*/
public void assignFatalLevel(String target);
/**
* assigns the {@link Level#TRACE} to the given class
*
* @param target the FQCN of the class
*/
public void assignTraceLevel(String target);
/**
* deactivates the logging of the given class
*
* @param target the FQCN of the class
*/
public void deactivateLogging(String target);
/**
* reloads the log4j configuration from the <code>log4j.properties</code>
* file in the classpath
*/
public void resetConfiguration();
/**
* @return the log4j configuration from the <code>log4j.properties</code>
* file in the classpath
*/
public String printLog4jConfig();
}
/**
* @author vongosling
*/
public class LoggingConfigImpl implements LoggingConfig, NotificationPublisherAware {
private Map<NotificationType, Long> notificationTypeMap = new HashMap<NotificationType, Long>();
private NotificationPublisher publisher;
public void setNotificationPublisher(NotificationPublisher notificationPublisher) {
this.publisher = notificationPublisher;
}
public String[] getLoggers(String filter) {
LoggerRepository loggerRepo = LogManager.getLoggerRepository();
Enumeration<?> enumList = loggerRepo.getCurrentLoggers();
Logger logger = null;
List<String> resultList = new ArrayList<String>();
while (enumList.hasMoreElements()) {
logger = (Logger) enumList.nextElement();
if (filter != null && logger.getName().contains(filter)) {
resultList.add(logger.getName());
}
}
return (String[]) resultList.toArray(new String[] {});
}
public void assignInfoLevel(String target) {
assignLogLevel(target, Level.INFO);
}
public void assignWarnLevel(String target) {
assignLogLevel(target, Level.WARN);
}
public void assignErrorLevel(String target) {
assignLogLevel(target, Level.ERROR);
}
public void assignDebug(String target) {
assignLogLevel(target, Level.DEBUG);
}
public void assignFatalLevel(String target) {
assignLogLevel(target, Level.FATAL);
}
public void deactivateLogging(String target) {
assignLogLevel(target, Level.OFF);
}
public void assignTraceLevel(String target) {
assignLogLevel(target, Level.TRACE);
}
private void assignLogLevel(String target, Level level) {
String message = level.toString() + " for '" + target + "'";
Logger existingLogger = LogManager.exists(target);
if (existingLogger != null) {
Level currentLevel = existingLogger.getLevel();
if (currentLevel == null) {
message = "initial to " + message;
} else {
message = "from " + currentLevel.toString() + " to " + message;
}
}
LogManager.getLogger(target).setLevel(level);
sendNotification(NotificationType.CHANGE_LOG_LEVEL, message);
}
private synchronized void sendNotification(NotificationType notificationType, String message) {
Long counter = 0L;
if (!notificationTypeMap.containsKey(notificationType))
notificationTypeMap.put(notificationType, counter);
counter = notificationTypeMap.get(notificationType);
notificationTypeMap.put(notificationType, Long.valueOf(counter + 1));
Notification notification = new Notification(notificationType.toString(), this, counter);
notification.setUserData(message);
publisher.sendNotification(notification);
}
public void resetConfiguration() {
ClassLoader cl = getClass().getClassLoader();
LogManager.resetConfiguration();
URL log4jprops = cl.getResource("log4j.xml");
if (log4jprops != null) {
//PropertyConfigurator.configure(log4jprops);
DOMConfigurator.configure(log4jprops);
}
sendNotification(NotificationType.RESET_CONFIGURATION, "used file: " + log4jprops.getFile());
}
public String printLog4jConfig() {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
PropertyPrinter pp = new PropertyPrinter(pw);
pp.print(pw);
// System.out.println(sw.toString());
return sw.toString();
}
}
/**
* @author vongosling
*/
public enum NotificationType {
CHANGE_LOG_LEVEL,
RESET_CONFIGURATION;
}
/**
* @author vongosling
*/
public class Log4jMDC {
private static final Logger log = LoggerFactory.getLogger(Log4jMDC.class);
public static void main(String[] args) throws InterruptedException, ExecutionException {
ScheduledExecutorService service = Executors.newScheduledThreadPool(10);
Runnable mdcTask = new Runnable() {
public void run() {
MDC.put("first", RandomStringUtils.randomAlphabetic(10));
MDC.put("last", RandomStringUtils.randomAlphabetic(10));
log.debug("Mission launched...");
MDC.clear();
log.warn("MDC cleared...");
}
};
final ScheduledFuture<?> future1 = service.scheduleAtFixedRate(mdcTask, 0, 1,
TimeUnit.SECONDS);
ScheduledFuture<?> future2 = service.schedule(new Callable<Boolean>() {
public Boolean call() throws Exception {
return future1.cancel(true);
}
}, 5, TimeUnit.SECONDS);
System.out.println(future2.get());
service.shutdown();
}
}
/**
* @author vongosling
*/
public class OrderInterfacePerformance extends AbstractJavaSamplerClient {
private OrderPortalService orderPortalService;
private SampleResult results;
/**
* @param orderPortalService the orderPortalService to set
*/
public void setOrderPortalService(OrderPortalService orderPortalService) {
this.orderPortalService = orderPortalService;
}
@Override
public Arguments getDefaultParameters() {
Arguments params = new Arguments();
params.addArgument("name", "kaka");
return params;
}
@Override
protected Logger getLogger() {
return super.getLogger();
}
@Override
public void setupTest(JavaSamplerContext context) {
results = new SampleResult();
}
@Override
public void teardownTest(JavaSamplerContext context) {
super.teardownTest(context);
}
public SampleResult runTest(JavaSamplerContext paramJavaSamplerContext) {
String parameterValue = paramJavaSamplerContext.getParameter("name");
results.setSamplerData(parameterValue);
ResultModel<ArrayList<OrderDto>> result = new ResultModel<ArrayList<OrderDto>>();
results.sampleStart();
try {
//Invocation logical processing
OrderDto order = new OrderDto();
List<String> statuses = new ArrayList<String>();
statuses.add("payment_part");
statuses.add("payment_none");
order.setUid("300208380");
order.setStatuses(statuses);
result = orderPortalService.getOrders(order, 1, 10);
results.sampleEnd();
if (result.isSuccessed()) {
results.setSuccessful(true);
} else {
results.setSuccessful(false);
}
} catch (Exception e) {
results.setSuccessful(false);
System.err.println(e.getLocalizedMessage());
} finally {
System.out.println(result);
}
return results;
}
}
/**
* @author vongosling
*/
public class ServerMonitor implements ServerMonitorMBean {
private final ServerImpl target;
public ServerMonitor(ServerImpl target) {
this.target = target;
}
public long getUpTime() {
return System.nanoTime() - target.startTime;
}
}
/**
* @author vongosling
*/
public class ServerMonitorDynamic implements DynamicMBean {
private final ServerImpl target;
private MBeanInfo mBeanInfo;
public ServerMonitorDynamic(ServerImpl target) {
this.target = target;
}
// 实现获取被管理的 ServerImpl的 upTime
public long upTime() {
return System.nanoTime() - target.startTime;
}
//javax.management.MBeanServer 会通过查询 getAttribute("Uptime") 获得 "Uptime" 属性值
public Object getAttribute(String attribute) throws AttributeNotFoundException, MBeanException,
ReflectionException {
if (attribute.equals("UpTime")) {
return upTime();
}
return null;
}
// 给出 ServerMonitor 的元信息。
public MBeanInfo getMBeanInfo() {
if (mBeanInfo == null) {
try {
Class<?> cls = this.getClass();
// 用反射获得 "upTime" 属性的读方法
Method readMethod = cls.getMethod("upTime", new Class[0]);
// 用反射获得构造方法
Constructor<?> constructor = cls.getConstructor(new Class[] { ServerImpl.class });
// 关于 "upTime" 属性的元信息 : 名称为 UpTime，只读属性 ( 没有写方法 )。
MBeanAttributeInfo upTimeMBeanAttributeInfo = new MBeanAttributeInfo("UpTime",
"The time span since server start", readMethod, null);
// 关于构造函数的元信息
MBeanConstructorInfo mBeanConstructorInfo = new MBeanConstructorInfo(
"Constructor for ServerMonitor", constructor);
//ServerMonitor 的元信息，为了简单起见，在这个例子里，
// 没有提供 invocation 以及 listener 方面的元信息
mBeanInfo = new MBeanInfo(cls.getName(), "Monitor that controls the server",
new MBeanAttributeInfo[] { upTimeMBeanAttributeInfo },
new MBeanConstructorInfo[] { mBeanConstructorInfo }, null, null);
} catch (Exception e) {
throw new Error(e);
}
}
return mBeanInfo;
}
public AttributeList getAttributes(String[] arg0) {
return null;
}
public Object invoke(String arg0, Object[] arg1, String[] arg2) throws MBeanException,
ReflectionException {
return null;
}
public void setAttribute(Attribute arg0) throws AttributeNotFoundException,
InvalidAttributeValueException, MBeanException, ReflectionException {
return;
}
public AttributeList setAttributes(AttributeList arg0) {
return null;
}
}
/**
* @author vongosling
*/
public class JmxRunner {
private static ObjectName objectName_1;
private static ObjectName objectName_2;
private static MBeanServer server;
public static void main(String[] args) throws Exception {
init();
invoke();
}
private static void init() throws Exception {
ServerImpl serverImpl = new ServerImpl();
ServerMonitor serverMoniter = new ServerMonitor(serverImpl);
ServerMonitorDynamic serverMoniterDynamic = new ServerMonitorDynamic(serverImpl);
server = MBeanServerFactory.createMBeanServer();
objectName_1 = new ObjectName("com.von:name=von_server");
objectName_2 = new ObjectName("com.von:name=von_server_dynamic");
server.registerMBean(serverMoniter, objectName_1);
server.registerMBean(serverMoniterDynamic, objectName_2);
}
private static void invoke() throws Exception {
System.out.println(server.isRegistered(objectName_1));
System.out.println(server.isRegistered(objectName_2));
System.out.println(server.getAttribute(objectName_2, "UpTime"));
System.out.println(server.getAttribute(objectName_1, "UpTime"));
}
}
/**
* @author vongosling
*/
public class StringOperationPerfTest {
public static void main(String[] args) {
int OUTER_ITERATION = 5;
int INNER_ITERATION = 5000;
String addTestStr = "";
String concatTestStr = "";
StringBuffer concatTestSb = null;
StringBuilder concatTestSbu = null;
StopWatch stopWatch = new Slf4JStopWatch();
for (int outerIndex = 0; outerIndex < OUTER_ITERATION; outerIndex++) {
addTestStr = "";
for (int innerIndex = 0; innerIndex < INNER_ITERATION; innerIndex++)
addTestStr += "*";
stopWatch.lap("StringAddConcat");
}
for (int outerIndex = 0; outerIndex < OUTER_ITERATION; outerIndex++) {
concatTestStr = "";
for (int innerIndex = 0; innerIndex < INNER_ITERATION; innerIndex++)
concatTestStr = concatTestStr.concat("*");
stopWatch.lap("StringConcat");
}
for (int outerIndex = 0; outerIndex < OUTER_ITERATION; outerIndex++) {
concatTestSb = new StringBuffer();
for (int innerIndex = 0; innerIndex < INNER_ITERATION; innerIndex++)
concatTestSb.append("*");
stopWatch.lap("StringBufferConcat");
}
for (int outerIndex = 0; outerIndex < OUTER_ITERATION; outerIndex++) {
concatTestSbu = new StringBuilder();
for (int innerIndex = 0; innerIndex < INNER_ITERATION; innerIndex++)
concatTestSbu.append("*");
stopWatch.stop("StringBuilderConcat");
}
}
}
/**
* Serializable further research
*
* @author vongosling
*/
public class SerializableTest {
public static class CaseOne implements Serializable {
private static final long serialVersionUID = 1L;
public static int staticVar = 5;
public static void main(String[] args) {
try {
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("result.obj"));
out.writeObject(new CaseOne());
out.flush();
System.out.println(new File("result.obj").length());
out.writeObject(new CaseOne());
out.close();
System.out.println(new File("result.obj").length());
ObjectInputStream oin = new ObjectInputStream(new FileInputStream("result.obj"));
CaseOne t1 = (CaseOne) oin.readObject();
CaseOne t2 = (CaseOne) oin.readObject();
oin.close();
System.out.println(t1 == t2);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
}
}
/**
* Commons-Collections Demo
*
* @author vongosling
*/
public class CommonCollectionsTest {
@SuppressWarnings("unchecked")
@Test
public void IterableMapTest() {
//1
IterableMap map = new HashedMap();
map.put("name", "kaka");
MapIterator it = map.mapIterator();
while (it.hasNext()) {
Object key = it.next();
System.out.println(key);
Object value = it.getValue();
System.out.println(value);
it.setValue("messi");
}
System.out.println(map);
//2
OrderedMap orderedMap = new LinkedMap();
orderedMap.put("FIVE", "5");
orderedMap.put("SIX", "6");
orderedMap.put("SEVEN", "7");
System.out.println(orderedMap.firstKey());
System.out.println(orderedMap.nextKey("FIVE"));
//3
BidiMap bidi = new TreeBidiMap();
bidi.put("SIX", "6");
bidi.put("SEVEN", "7");
bidi.get("SIX"); // returns "6"
bidi.getKey("6"); // returns "SIX"
bidi.removeValue("6"); // removes the mapping
BidiMap inverse = bidi.inverseBidiMap(); // returns a map with keys and values swapped
System.out.println(inverse);
//4
Buffer buffer = new UnboundedFifoBuffer();
buffer.add("ONE");
buffer.add("TWO");
buffer.add("THREE");
buffer.remove(); // removes and returns the next in order, "ONE" as this is a FIFO
buffer.remove(); // removes and returns the next in order, "TWO" as this is a FIFO
//5
Iterator iter = new FilterIterator();
new UniqueFilterIterator(iter);
//6
Bag bag = new HashBag();
bag.add("ONE", 6); // add 6 copies of "ONE"
bag.remove("ONE", 2); // removes 2 copies of "ONE"
bag.getCount("ONE"); // returns 4, the number of copies in the bag (6 - 2)
}
public static class Blocking implements Runnable {
// Queue queue = new LinkedBlockingDeque();
Buffer queue = BlockingBuffer.decorate(new BoundedFifoBuffer());
@SuppressWarnings("unchecked")
public static void main(String[] args) throws InterruptedException {
Blocking blockThread = new Blocking();
Thread t = new Thread(blockThread);
t.start();
blockThread.queue.add("Hello");
Thread.sleep(5000);
blockThread.queue.add("Black Lee");
}
public void run() {
while (true) {
try {
String msg = (String) queue.remove();
System.out.println(msg);
} catch (Exception e) {
}
}
}
}
}
/**
* @author vongosling
*/
public class Perf4jInterceptor implements MethodBeforeAdvice, AfterReturningAdvice {
private Map<String, StopWatch> watches = new HashMap<String, StopWatch>();
public void before(Method method, Object[] args, Object target) throws Throwable {
String completeMethodName = getCompleteMethodName(target, method);
StopWatch stopWatch;
if (watches.containsKey(completeMethodName)) {
stopWatch = watches.get(completeMethodName);
stopWatch.start();
} else {
stopWatch = new Slf4JStopWatch(completeMethodName, Arrays.toString(args));
watches.put(completeMethodName, stopWatch);
}
}
public void afterReturning(Object returnValue, Method method, Object[] args, Object target)
throws Throwable {
String completeMethodName = getCompleteMethodName(target, method);
if (watches.containsKey(completeMethodName)) {
StopWatch stopWatch = watches.get(completeMethodName);
stopWatch.stop();
}
}
private String getCompleteMethodName(Object target, Method method) {
String className = "";
if (target != null) {
className = target.toString();
int loc = className.indexOf("@");
if (loc >= 0) {
className = className.substring(0, loc);
}
}
return className + "." + method.getName();
}
}
/**
* @author vongosling
*/
@Aspect
public class ExceptionAspect implements Ordered {
private final Logger logger = LoggerFactory.getLogger(ExceptionAspect.class);
private int order = 100;
@Pointcut("execution(public * com.service.*.*Impl.*(..)) && @annotation (com.service.aop.ServiceTrace)")
public void serviceMethod() {
}
@Around("serviceMethod()")
public Object doConcurrentOperation(ProceedingJoinPoint pjp) throws Throwable {
logger.debug("exception aop beginning...");
ResultModel<String> result = new ResultModel<String>();
TraceUtils.beginTrace();
try {
String remoteHost = DubboContext.getContext().getRemoteHost(); // 获取调用方IP
logger.info("remoteHost = {}", remoteHost);
Object nomralResult = pjp.proceed();
//JMX monitor some unexpected things
if (logger.isDebugEnabled()) {
ByteArrayOutputStream bo = new ByteArrayOutputStream();
ObjectOutputStream oo = new ObjectOutputStream(bo);
oo.writeObject(nomralResult);
byte[] array = bo.toByteArray();
logger.debug("result size is {}", array.length);
logger.debug("result is {}", ToStringBuilder.reflectionToString(nomralResult,
ToStringStyle.MULTI_LINE_STYLE));
oo.close();
}
return nomralResult;
} catch (DowjonesIllegalArgumentException ex) {
return new ExceptionAspectProcessor() {
@Override
public void hookOn(ResultModel<String> result) {
result.setErrorCode(ErrorCode.ILLEGAL_ARGUMENT);
}
}.doProcessBiz(result, ex);
} catch (IllegalArgumentException ex) {
return new ExceptionAspectProcessor() {
@Override
public void hookOn(ResultModel<String> result) {
result.setErrorCode(ErrorCode.ILLEGAL_ARGUMENT);
}
}.doProcess(result, ex);
} catch (Exception ex) {
return new ExceptionAspectProcessor() {
@Override
public void hookOn(ResultModel<String> result) {
result.setErrorCode(ErrorCode.UNKNOWN_ERROR);
}
}.doProcess(result, ex);
} finally {
TraceUtils.endTrace();
}
}
public int getOrder() {
return order;
}
public void setOrder(int order) {
this.order = order;
}
private abstract class ExceptionAspectProcessor {
protected abstract void hookOn(ResultModel<String> result);
public final Object doProcess(ResultModel<String> result, Exception ex) {
logger.error("catch exception: ", ex);
doProcessResult(result,ex) ;
hookOn(result);
logger.debug("return result {}", result);
return result;
};
public final Object doProcessBiz(ResultModel<String> result, Exception ex) {
logger.warn("catch exception: ", ex);
doProcessResult(result,ex) ;
hookOn(result);
logger.debug("return result {}", result);
return result;
};
private final void doProcessResult(ResultModel<String> result, Exception ex){
result.setSuccessed(false);
result.setExceptionDesc(ex.getMessage());//will delete in future
result.setErrorDesc(ex.getMessage());
}
}
}
/**
* 使用JCA/JCE(SUN默认的Cryptographic Service Provider)对称密钥进行加密解密
*
* @author vongosling Nov 7, 2011 2:31:24 PM
*/
public class DESEncryptUtils {
/**
* 解密
*
* @param pwd
* @param strKey
* @return
*/
public static String decrypt(String pwd, String strKey) {
if (StringUtils.isEmpty(pwd) || StringUtils.isEmpty(strKey)) {
return null;
}
try {
//1.
byte[] rawKeyData = (new String(strKey)).getBytes();
byte[] encryptedData = Base64.decode(pwd);
//2.
Security.addProvider(new com.sun.crypto.provider.SunJCE());
//3.
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
DESKeySpec dks = new DESKeySpec(rawKeyData);
SecretKey key = keyFactory.generateSecret(dks);
//4.
Cipher cipher = Cipher.getInstance("DES");
SecureRandom sr = new SecureRandom();
cipher.init(Cipher.DECRYPT_MODE, key, sr);
byte[] decryptedData = cipher.doFinal(encryptedData);
//5.
return new String(decryptedData);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 加密
*
* @param pwd 加密串
* @param strKey 加密码
* @return
*/
public static String encrypt(String pwd, String strKey) {
if (StringUtils.isEmpty(pwd) || StringUtils.isEmpty(strKey)) {
return null;
}
try {
//1.
byte[] decryptData = pwd.getBytes();
byte[] rawKeyData = (new String(strKey)).getBytes();
//2.获得加密服务提供者
Security.addProvider(new com.sun.crypto.provider.SunJCE());//Sun默认提供者实现
//3.
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
DESKeySpec dks = new DESKeySpec(rawKeyData);
SecretKey key = keyFactory.generateSecret(dks);//生成DES密钥
//4.
Cipher cipher = Cipher.getInstance("DES");//创建Cipher对象
SecureRandom sr = new SecureRandom();
//5.初始化Cipher
cipher.init(Cipher.ENCRYPT_MODE, key, sr);
//6.
byte[] encryptData = cipher.doFinal(decryptData);
//7.
return Base64.encode(encryptData);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
/**
* @author vongosling
*/
public class TraceUtils {
public static final String TRACE_ID_KEY = "traceId";
public static final int TRACE_ID_LENGTH = 8;
public static void beginTrace() {
String traceId = RandomStringUtils.randomAlphanumeric(TRACE_ID_LENGTH);
MDC.put(TRACE_ID_KEY, traceId);
}
public static void beginTrace(String traceId) {
MDC.put(TRACE_ID_KEY, traceId);
}
public static void endTrace() {
MDC.remove(TRACE_ID_KEY);
}
}
/**
* Result List based cursor theory
*
* @author vongosling
* @param <T>
*/
public class ResultCursorList<T> extends BaseDo {
private static final long serialVersionUID = -6593448580923210640L;
/**
* Result list
*/
private List<T> values;
/**
* Total result
*/
private Long totalCount;
/**
* For forwarding query,it can be timestamp or offset,when
* timestamp,previousCursor must be less than or equals nextCursor
*/
private Long previousCursor;
/**
* For backwarding query
*/
private Long nextCursor;
/**
* Init case
*
* @param clasz
* @return
*/
public static <T> ResultCursorList<T> build(Class<T> clazz) {
return new ResultCursorList<T>().setValues(new ArrayList<T>()).setTotalCount(0l)
.setPreviousCursor(0l).setNextCursor(0l);
}
/**
* Common case
*
* @param clasz
* @param values
* @param totalCount
* @param previousCursor
* @param nextCursor
* @return
*/
public static <T> ResultCursorList<T> build(Class<T> clazz, List<T> values, Long totalCount,
Long previousCursor, Long nextCursor) {
if (values == null || values.isEmpty()) {
return build(clazz);
}
return new ResultCursorList<T>().setValues(values).setTotalCount(totalCount)
.setPreviousCursor(previousCursor).setNextCursor(nextCursor);
}
public List<T> getValues() {
return values;
}
public ResultCursorList<T> setValues(List<T> values) {
this.values = values;
return this;
}
public Long getTotalCount() {
return totalCount;
}
public ResultCursorList<T> setTotalCount(Long totalCount) {
this.totalCount = totalCount;
return this;
}
public Long getPreviousCursor() {
return previousCursor;
}
public ResultCursorList<T> setPreviousCursor(Long previousCursor) {
this.previousCursor = previousCursor;
return this;
}
public Long getNextCursor() {
return nextCursor;
}
public ResultCursorList<T> setNextCursor(Long nextCursor) {
this.nextCursor = nextCursor;
return this;
}
}
/**
* @author vongosling
*/
public final class CacheHelper {
public static final String SPLIT = ":";
private CacheHelper() {
}
public enum CacheDomain {
/** 用户信息 */
USER("U"),
/** 员工信息 */
STAFF("S"),
/** 好友关系 */
FRIENDRELATION("R"),
/** 权限集 */
PERMISSION("P");
private String value;
private CacheDomain(String value) {
this.value = value;
}
public String getValue() {
return value;
}
}
/**
* @param cacheDomain
* @param valueId
* @param version
* @see http://en.wikipedia.org/wiki/SHA-2
* @return
*/
public static String getKey(CacheDomain cacheDomain, String valueId, int version) {
String key = cacheDomain.getValue() + SPLIT + valueId + SPLIT + version;
final byte[] bytes = key.getBytes();
if (bytes.length > 250) {
key = DigestUtils.sha256Hex(key);
}
return key;
}
}
/**
* @author vongosling
*/
public class BaseDo implements Serializable {
private static final long serialVersionUID = 8995346561768156845L;
/**
* @see java.lang.Object#toString
*/
public String toString() {
return ToStringBuilder.reflectionToString(this, ToStringStyle.DEFAULT_STYLE);
}
/**
* @see java.lang.Object#equals(Object)
*/
public boolean equals(Object object) {
if (!(object instanceof BaseDo)) {
return false;
}
return new EqualsBuilder().appendSuper(super.equals(object)).isEquals();
}
/**
* @see java.lang.Object#hashCode()
*/
public int hashCode() {
return new HashCodeBuilder(208989125, 784658211).appendSuper(super.hashCode()).toHashCode();
}
}