S3TransferManagerProvider.java

package com.aol.micro.server.s3.plugin;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ThreadFactory;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.transfer.TransferManager;
import com.aol.micro.server.s3.S3Configuration;

@Configuration
public class S3TransferManagerProvider {

    @Autowired
    private S3Configuration s3Configuration;

    @Autowired
    private AmazonS3Client amazonS3Client;

    @Bean
    public TransferManager getTransferManager() {
        return new TransferManager(
                                   amazonS3Client, s3UploadExecutorService());
    }

    @Bean
    public ExecutorService s3UploadExecutorService() {
        ThreadFactory threadFactory = new ThreadFactory() {
            private int threadCount = 1;

            public Thread newThread(Runnable r) {
                Thread thread = new Thread(
                                           r);
                thread.setName(s3Configuration.getUploadThreadNamePrefix() + threadCount++);
                return thread;
            }
        };
        return Executors.newFixedThreadPool(s3Configuration.getUploadThreads(), threadFactory);
    }

}