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创建线程池保证为每个线程指定名称,并对线程池定制异常策略。
private final String name;
private final Map<Integer, ExecutorService> executorServiceMap;
private final int channelCount = 10;
private final int channelBuffer = 20;
@Override
public final void submit(T task) {
ExecutorService executorService = getExecutorService(task);
executorService.submit(task);
}
private ExecutorService getExecutorService(T task){
return this.executorServiceMap.computeIfAbsent(getIndex(task.shardingKey()), this::createExecutorService);
}
private ExecutorService createExecutorService(Integer index){
BasicThreadFactory basicThreadFactory = new BasicThreadFactory.Builder()
.daemon(true)
.namingPattern(name + "-Task-Executor-Channel-" + index + "-Thread-%d")
.uncaughtExceptionHandler((t, e) -> LOGGER.error("failed to run task on thread {}.",t, e)).build();
return new ThreadPoolExecutor(1, 1,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<>(channelBuffer),
basicThreadFactory,
new ThreadPoolExecutor.CallerRunsPolicy()
);
}
private Integer getIndex(Long uid){
return Math.abs(uid.intValue()) % channelCount;
}