java多线程（1）：基础
2014-02-12 12:56
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第0章：简介
第1节：参考网站/文档
http://lavasoft.blog.51cto.com/62575/27069/http://programming.iteye.com/blog/158568
http://www.cnblogs.com/rollenholt/archive/2011/08/28/2156357.html
http://www.cnblogs.com/jackyuj/archive/2010/11/24/1886553.html
javaJDK文档
java并发编程实践 （电子工业出版社 方妙译）
第2节：札记
第1章：实例
第1节：线程服务工具类
（1）线程池工具类 ExecutorServiceUtils.java
package com.mcc.core.concurrent;import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/**
* 线程服务工具类
*
* @author <a href="mailto:573511675@qq.com">menergy</a>
* DateTime: 13-12-26 下午6:05
*/
public abstract class ExecutorServiceUtils {
// 线程池
private static Map<String, ExecutorService> executorMap = new ConcurrentHashMap<String, ExecutorService>();
/**
* 线程池缓存
*
* @param name 线程池名称
* @param size 线程池大小
* @return 线程池
*/
public static ExecutorService getExecutor(final String name, int size) {
if (!executorMap.containsKey(name)) {
size = size > 0 ? size : 1;
BasicThreadFactory factory = new BasicThreadFactory.Builder()
.namingPattern(name + "-thread-%d")
.priority(Thread.MAX_PRIORITY)
.build();
executorMap.put(name, Executors.newFixedThreadPool(size, factory));
}
return executorMap.get(name);
}
public static void main(String args[]){
Executor executor = ExecutorServiceUtils.getExecutor("test",3);
executor.execute(new Runnable(){
@Override
public void run() {
for(int i = 0; i < 10; i++){
try {
System.out.println("thread1 running -- " + i);
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
});
executor.execute(new Runnable(){
@Override
public void run() {
for(int i = 0; i < 10; i++){
try {
System.out.println("thread2 running -- " + i);
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
});
executor.execute(new Runnable(){
@Override
public void run() {
for(int i = 0; i < 10; i++){
try {
System.out.println("thread3 running -- " + i);
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
});
}
}
（2）线程工厂基类BasicThreadFactory.java
package com.mcc.core.concurrent;import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicLong;
/**
* 线程工厂基类
*
* @author <a href="mailto:573511675@qq.com">menergy</a>
* DateTime: 13-12-26 下午5:50
*/
public class BasicThreadFactory implements ThreadFactory {
//计算线程工厂创建的线程数
private final AtomicLong threadCounter;
//包装工厂
private final ThreadFactory wrappedFactory;
//非捕获异常处理
private final Thread.UncaughtExceptionHandler uncaughtExceptionHandler;
//线程命名模式
private final String namingPattern;
//优先级
private final Integer priority;
//后台状态标识
private final Boolean daemonFlag;
/**
* Creates a new instance of {@code ThreadFactoryImpl} and configures it
* from the specified {@code Builder} object.
*
* @param builder the {@code Builder} object
*/
private BasicThreadFactory(Builder builder) {
if (builder.wrappedFactory == null) {
wrappedFactory = Executors.defaultThreadFactory();
} else {
wrappedFactory = builder.wrappedFactory;
}
namingPattern = builder.namingPattern;
priority = builder.priority;
daemonFlag = builder.daemonFlag;
uncaughtExceptionHandler = builder.exceptionHandler;
threadCounter = new AtomicLong();
}
/**
* 获取包装工厂
* @return 不会返回null
*/
public final ThreadFactory getWrappedFactory() {
return wrappedFactory;
}
/**
* 获取命名模式
* @return
*/
public final String getNamingPattern() {
return namingPattern;
}
/**
* 获取是否为后台线程标识
* @return
*/
public final Boolean getDaemonFlag() {
return daemonFlag;
}
/**
* 获取优先级
* @return
*/
public final Integer getPriority() {
return priority;
}
/**
* 获取非捕获异常处理器
* @return
*/
public final Thread.UncaughtExceptionHandler getUncaughtExceptionHandler() {
return uncaughtExceptionHandler;
}
/**
* 获取创建的线程数量
* @return
*/
public long getThreadCount() {
return threadCounter.get();
}
/**
* 创建新线程
* @param r
* @return
*/
public Thread newThread(Runnable r) {
Thread t = getWrappedFactory().newThread(r);
initializeThread(t);
return t;
}
/**
* 初始化线程
* @param t
*/
private void initializeThread(Thread t) {
if (getNamingPattern() != null) {
Long count = Long.valueOf(threadCounter.incrementAndGet());
t.setName(String.format(getNamingPattern(), count));
}
if (getUncaughtExceptionHandler() != null) {
t.setUncaughtExceptionHandler(getUncaughtExceptionHandler());
}
if (getPriority() != null) {
t.setPriority(getPriority().intValue());
}
if (getDaemonFlag() != null) {
t.setDaemon(getDaemonFlag().booleanValue());
}
}
/**
* 创建器类
*/
public static class Builder
implements com.mcc.core.concurrent.Builder<BasicThreadFactory> {
//包装工厂
private ThreadFactory wrappedFactory;
//非捕获异常处理器
private Thread.UncaughtExceptionHandler exceptionHandler;
//命名模式
private String namingPattern;
//优先级
private Integer priority;
//后台标识
private Boolean daemonFlag;
/**
* 创建包装工厂
* @param factory
* @return
*/
public Builder wrappedFactory(ThreadFactory factory) {
if (factory == null) {
throw new NullPointerException(
"Wrapped ThreadFactory must not be null!");
}
wrappedFactory = factory;
return this;
}
/**
* 设置命名模式
* @param pattern
* @return
*/
public Builder namingPattern(String pattern) {
if (pattern == null) {
throw new NullPointerException(
"Naming pattern must not be null!");
}
namingPattern = pattern;
return this;
}
/**
* 设置后台标识
* @param f
* @return
*/
public Builder daemon(boolean f) {
daemonFlag = Boolean.valueOf(f);
return this;
}
/**
* 设置优先级
* @param prio
* @return
*/
public Builder priority(int prio) {
priority = Integer.valueOf(prio);
return this;
}
/**
* 设置非捕获异常处理器
* @param handler
* @return
*/
public Builder uncaughtExceptionHandler(
Thread.UncaughtExceptionHandler handler) {
if (handler == null) {
throw new NullPointerException(
"Uncaught exception handler must not be null!");
}
exceptionHandler = handler;
return this;
}
/**
* 重置构建参数
*/
public void reset() {
wrappedFactory = null;
exceptionHandler = null;
namingPattern = null;
priority = null;
daemonFlag = null;
}
/**
* 构建基类线程工厂
* @return
*/
public BasicThreadFactory build() {
BasicThreadFactory factory = new BasicThreadFactory(this);
reset();
return factory;
}
}
}
（3）构建器接口Builder.java
package com.mcc.core.concurrent;/**
* 构建器接口
*
* @author <a href="mailto:573511675@qq.com">menergy</a>
* DateTime: 13-12-26 下午5:56
*/
public interface Builder<T> {
public T build();
}
第2节：自定义线程创建器
package com.mcc.core.concurrent;import com.mcc.core.reflection.ClassUtils;
import java.io.Serializable;
/**
*自定义线程创建器
* @author <a href="mailto:573511675@qq.com">menergy</a>
* @version 2013-12-8
*/
public class CustomizableThreadCreator implements Serializable {
private static final long serialVersionUID = -8401919277161997988L;
private String threadNamePrefix;
private int threadPriority = Thread.NORM_PRIORITY;
private boolean daemon = false;
private ThreadGroup threadGroup;
private int threadCount = 0;
private final Object threadCountMonitor = new SerializableMonitor();
public CustomizableThreadCreator() {
this.threadNamePrefix = getDefaultThreadNamePrefix();
}
public CustomizableThreadCreator(String threadNamePrefix) {
this.threadNamePrefix = (threadNamePrefix != null ? threadNamePrefix : getDefaultThreadNamePrefix());
}
/**
* 设置线程名前缀
*
* @param threadNamePrefix
*/
public void setThreadNamePrefix(String threadNamePrefix) {
this.threadNamePrefix = (threadNamePrefix != null ? threadNamePrefix : getDefaultThreadNamePrefix());
}
/**
* 获取线程名前缀
*
* @return
*/
public String getThreadNamePrefix() {
return this.threadNamePrefix;
}
/**
* 设置线程优先级
*
* @param threadPriority
*/
public void setThreadPriority(int threadPriority) {
this.threadPriority = threadPriority;
}
/**
* 获取线程优先级
*
* @return
*/
public int getThreadPriority() {
return this.threadPriority;
}
/**
* 设置是否是后台线程
*
* @param daemon
*/
public void setDaemon(boolean daemon) {
this.daemon = daemon;
}
/**
* 判断是否是后台线程
*
* @return
*/
public boolean isDaemon() {
return this.daemon;
}
/**
* 设置线程组名
*
* @param name
*/
public void setThreadGroupName(String name) {
this.threadGroup = new ThreadGroup(name);
}
/**
* 设置线程组名
*
* @param threadGroup
*/
public void setThreadGroup(ThreadGroup threadGroup) {
this.threadGroup = threadGroup;
}
/**
* 获取线程组
*
* @return
*/
public ThreadGroup getThreadGroup() {
return this.threadGroup;
}
/**
* 创建线程
*
* @param runnable
* @return
*/
public Thread createThread(Runnable runnable) {
Thread thread = new Thread(getThreadGroup(), runnable, nextThreadName());
thread.setPriority(getThreadPriority());
thread.setDaemon(isDaemon());
return thread;
}
/**
* 下一个线程名
*
* @return
*/
protected String nextThreadName() {
int threadNumber = 0;
synchronized (this.threadCountMonitor) {
this.threadCount++;
threadNumber = this.threadCount;
}
return getThreadNamePrefix() + threadNumber;
}
/**
* 获取默认线程名前缀
*
* @return
*/
protected String getDefaultThreadNamePrefix() {
return ClassUtils.getShortClassName(getClass()) + "-";
}
/**
* 空对象作为序列化监控对象
*
* @author <a href="mailto:573511675@qq.com">menergy</a>
* @version 2013-12-8
*/
private static class SerializableMonitor implements Serializable {
}
/**
*
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
}
}
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