/**
 * Copyright 2016, RadiantBlue Technologies, Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/
package jobmanager;

import java.lang.reflect.Method;
import java.util.concurrent.Executor;

import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

@SpringBootApplication
@Configuration
@EnableAsync
@EnableScheduling
@ComponentScan({ "jobmanager, util" })
public class Application extends SpringBootServletInitializer implements AsyncConfigurer {

	@Override
	protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
		return builder.sources(Application.class);
	}

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}

	@Override
	public Executor getAsyncExecutor() {
		ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
		// Thread pool capped to work optimally at 512MB ram (per the PCF app)
		executor.setCorePoolSize(250);
		executor.setMaxPoolSize(250);
		executor.initialize();
		return executor;
	}

	@Override
	public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
		return new AsyncUncaughtExceptionHandler() {
			@Override
			public void handleUncaughtException(Throwable ex, Method method, Object... params) {
				String error = String.format("Uncaught Threading exception encountered in %s with details: %s", ex.getMessage(),
						method.getName());
				System.out.println(error);
			}
		};
	}
}
@@ -2074,33 +2074,33 @@
 setCorePoolSize(
-2
+1
 50);%0A%09%09executor.
@@ -2114,17 +2114,17 @@
 oolSize(
-2
+1
 50);%0A%09%09e

Tweak concurrent Threads