| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.camel.spring.util; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.Arrays; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.springframework.beans.factory.InitializingBean; |
| |
| import static org.apache.camel.util.ObjectHelper.name; |
| |
| /** |
| * A simple helper bean for running main classes from within the spring.xml |
| * usually asynchronous in a background thread; which is useful for demos such |
| * as running Swing programs in the same JVM. |
| * |
| * @version |
| */ |
| public class MainRunner implements InitializingBean, Runnable { |
| private static final Logger LOG = LoggerFactory.getLogger(MainRunner.class); |
| |
| private Class<?> main; |
| private String[] args = {}; |
| private boolean asyncRun = true; |
| private long delay; |
| |
| public String toString() { |
| return "MainRunner(" + name(main) + " " + Arrays.asList(getArgs()) + ")"; |
| } |
| |
| public void run() { |
| try { |
| runMethodWithoutCatchingExceptions(); |
| } catch (NoSuchMethodException e) { |
| LOG.error("Class: " + name(main) + " does not have a main method: " + e, e); |
| } catch (IllegalAccessException e) { |
| LOG.error("Failed to run: " + this + ". Reason: " + e, e); |
| } catch (InvocationTargetException e) { |
| Throwable throwable = e.getTargetException(); |
| LOG.error("Failed to run: " + this + ". Reason: " + throwable, throwable); |
| } |
| } |
| |
| public void runMethodWithoutCatchingExceptions() throws NoSuchMethodException, IllegalAccessException, InvocationTargetException { |
| if (delay > 0) { |
| try { |
| Thread.sleep(delay); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| Method method = main.getMethod("main", String[].class); |
| if (!Modifier.isStatic(method.getModifiers())) { |
| throw new IllegalArgumentException("The main method is not static!: " + method); |
| } |
| Object[] arguments = {getArgs()}; |
| method.invoke(null, arguments); |
| } |
| |
| public String[] getArgs() { |
| return args; |
| } |
| |
| public void setArgs(String[] args) { |
| this.args = args; |
| } |
| |
| public boolean isAsyncRun() { |
| return asyncRun; |
| } |
| |
| public void setAsyncRun(boolean asyncRun) { |
| this.asyncRun = asyncRun; |
| } |
| |
| public Class getMain() { |
| return main; |
| } |
| |
| public void setMain(Class main) { |
| this.main = main; |
| } |
| |
| public long getDelay() { |
| return delay; |
| } |
| |
| public void setDelay(long delay) { |
| this.delay = delay; |
| } |
| |
| public void afterPropertiesSet() throws Exception { |
| if (main == null) { |
| throw new IllegalArgumentException("You must specify a main class!"); |
| } |
| if (isAsyncRun()) { |
| Thread thread = new Thread(this, "Thread for: " + this); |
| thread.start(); |
| } else { |
| runMethodWithoutCatchingExceptions(); |
| } |
| } |
| } |