org.springone2gx_2011.integration.asyncgateway.AsyncGatewayDemo.java Source code

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Here is the source code for org.springone2gx_2011.integration.asyncgateway.AsyncGatewayDemo.java

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/*
 * Copyright 2002-2011 the original author or authors.
 *
 * 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 org.springone2gx_2011.integration.asyncgateway;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @author Oleg Zhurakousky
 * SpringOne2GX, Chicago 2011
 */
public class AsyncGatewayDemo {
    private static ExecutorService executor = Executors.newCachedThreadPool();
    private static int timeout = 10;

    @Test
    public void testAsyncGateway() throws Exception {
        ApplicationContext ac = new ClassPathXmlApplicationContext("async-gateway-config.xml",
                AsyncGatewayDemo.class);
        MyGateway gateway = ac.getBean("mathService", MyGateway.class);

        List<Future<String>> results = new ArrayList<Future<String>>();
        for (int i = 0; i < 100; i++) {
            Future<String> result = gateway.process("Hello Spring One");
            results.add(result);
        }

        for (final Future<String> result : results) {
            executor.execute(new Runnable() {
                public void run() {
                    try {
                        String finalResult = result.get(timeout, TimeUnit.SECONDS);
                        System.out.println("Final Result is: " + finalResult);
                    } catch (ExecutionException e) {
                        System.out.println("Exception happened during the execution of the gateway method: " + e);
                    } catch (TimeoutException tex) {
                        System.out.println("Timeout occured while waiting for the execution of the gateway method");
                    } catch (Exception ie) {
                        System.out.println(ie);
                        Thread.currentThread().interrupt();
                    }
                }
            });
        }
        executor.shutdown();
        executor.awaitTermination(60, TimeUnit.SECONDS);
    }
}