com.glaf.core.execution.SolitaryExecutionManager.java Source code

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Here is the source code for com.glaf.core.execution.SolitaryExecutionManager.java

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/*
 * 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 com.glaf.core.execution;

import java.util.Enumeration;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicBoolean;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.glaf.core.config.SystemProperties;
import com.glaf.core.util.ClassUtils;
import com.glaf.core.util.PropertiesUtils;

/**
 * 
 * ????SystemProperties.getConfigRootPath()<br/>
 * conftest.properties?/conf/test.properties
 * 
 */
public class SolitaryExecutionManager {
    private static class SolitaryExecutionManagerHolder {
        public static SolitaryExecutionManager instance = new SolitaryExecutionManager();
    }

    private static final Log logger = LogFactory.getLog(SolitaryExecutionManager.class);

    protected static AtomicBoolean running = new AtomicBoolean(false);

    public static SolitaryExecutionManager getInstance() {
        return SolitaryExecutionManagerHolder.instance;
    }

    private SolitaryExecutionManager() {

    }

    /**
     * ?
     * 
     * @param configFile
     *            ?
     *            confexec.properties?/conf/exec.properties
     */
    public void execute(String configFile) {
        if (!running.get()) {
            try {
                running.set(true);
                if (!configFile.startsWith("/")) {
                    configFile = "/" + configFile;
                }
                String filename = SystemProperties.getConfigRootPath() + configFile;
                Properties props = PropertiesUtils.loadFilePathResource(filename);
                if (props != null && props.keys().hasMoreElements()) {
                    Enumeration<?> e = props.keys();
                    while (e.hasMoreElements()) {
                        String className = (String) e.nextElement();
                        String content = props.getProperty(className);
                        Object object = ClassUtils.instantiateObject(className);
                        if (object instanceof ExecutionHandler) {
                            ExecutionHandler handler = (ExecutionHandler) object;
                            try {
                                handler.execute(content);
                            } catch (Exception ex) {
                                ex.printStackTrace();
                                logger.error(ex);
                            }
                        }
                    }
                }
            } catch (Exception ex) {
                ex.printStackTrace();
                throw new RuntimeException(ex);
            } finally {
                running.set(false);
            }
        }
    }

    public static void main(String[] args) {
        System.out.println("?" + SystemProperties.getConfigRootPath());
        if (args != null && args.length == 1) {
            SolitaryExecutionManager.getInstance().execute(args[0]);
        } else {
            System.out.println("??");
            throw new java.lang.IllegalArgumentException("config file is not specified");
        }
    }

}