org.wso2.carbon.oc.agent.internal.OCAgentUtils.java Source code

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Here is the source code for org.wso2.carbon.oc.agent.internal.OCAgentUtils.java

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/*
 * Copyright 2004,2005 The Apache Software Foundation.
 *
 * 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.wso2.carbon.oc.agent.internal;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.oc.agent.model.OCConfiguration;
import org.wso2.carbon.oc.agent.model.OCPublishers;
import org.wso2.carbon.server.admin.service.ServerAdmin;
import org.wso2.carbon.utils.CarbonUtils;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;

/*
Allows to invoke commands in server restart, shutdown
*/

public class OCAgentUtils {
    private static final String FORCE_SHUTDOWN = "FORCE_SHUTDOWN";
    private static final String FORCE_RESTART = "FORCE_RESTART";
    private static final String GRACEFUL_SHUTDOWN = "GRACEFUL_SHUTDOWN";
    private static final String GRACEFUL_RESTART = "GRACEFUL_RESTART";
    private static final Log logger = LogFactory.getLog(OCAgentUtils.class);

    private OCAgentUtils() {
    }

    /**
     * Extract all enabled publisher info
     *
     * @return Publishers - get all publisher objects
     */
    public static OCPublishers getOcPublishers() {
        OCPublishers publishers = null;
        try {
            JAXBContext context = JAXBContext.newInstance(OCConfiguration.class);
            Unmarshaller um = context.createUnmarshaller();
            OCConfiguration oc = (OCConfiguration) um.unmarshal(new FileReader(
                    CarbonUtils.getCarbonConfigDirPath() + File.separator + OCAgentConstants.OC_XML));
            publishers = oc.getOcPublishers();
        } catch (JAXBException e) {
            logger.error(e.getMessage(), e);
        } catch (FileNotFoundException e) {
            logger.error(OCAgentConstants.OC_XML + " is missing in this path", e);
        }

        return publishers;
    }

    /**
     * @param command "RESTART", "SHUTDOWN" etc..
     */

    public static void performAction(String command) {
        ServerAdmin serverAdmin = (ServerAdmin) OCAgentDataHolder.getInstance().getServerAdmin();
        if (serverAdmin != null) {
            try {
                if (FORCE_RESTART.equals(command)) {
                    serverAdmin.restart();
                } else if (GRACEFUL_RESTART.equals(command)) {
                    serverAdmin.restartGracefully();
                } else if (FORCE_SHUTDOWN.equals(command)) {
                    serverAdmin.shutdown();
                } else if (GRACEFUL_SHUTDOWN.equals(command)) {
                    serverAdmin.shutdownGracefully();
                } else {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Unknown command received. [" + command + "]");
                    }
                }
            } catch (Exception e) {
                logger.error("Failed while executing command. [" + command + "]", e);
            }
        } else {
            logger.error("Unable to perform action, ServerAdmin is null");
        }
    }
}