org.springframework.integration.splunk.support.AbstractSplunkDataWriter.java Source code

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Here is the source code for org.springframework.integration.splunk.support.AbstractSplunkDataWriter.java

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/*
 * Copyright 2011-2012 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.springframework.integration.splunk.support;

import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.Socket;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.context.SmartLifecycle;
import org.springframework.integration.splunk.core.DataWriter;
import org.springframework.integration.splunk.core.ServiceFactory;
import org.springframework.integration.splunk.event.SplunkEvent;
import org.springframework.util.Assert;

import com.splunk.Args;
import com.splunk.Service;

/**
 * Base class for {@link DataWriter}s to write data into Splunk.
 *
 * @author Jarred Li
 * @author David Turanski
 * @since 1.0
 *
 */
public abstract class AbstractSplunkDataWriter implements DataWriter, SmartLifecycle {

    protected final Log logger = LogFactory.getLog(getClass());

    protected Socket socket;

    protected Service service;

    protected Args args;

    private boolean running;

    private int phase;

    private boolean autoStartup = true;

    private final ServiceFactory serviceFactory;

    protected AbstractSplunkDataWriter(ServiceFactory serviceFactory, Args args) {
        Assert.notNull(serviceFactory, "service factory cannot be null");
        this.serviceFactory = serviceFactory;

        Assert.notNull(args, "args cannot be null");
        this.args = args;
    }

    public void write(SplunkEvent event) throws Exception {
        if (logger.isDebugEnabled()) {
            logger.debug("writing event to splunk:" + event);
        }

        doWrite(event, socket, service, args);
    }

    protected void doWrite(SplunkEvent event, Socket socket, Service service, Args args) throws IOException {
        OutputStream ostream = socket.getOutputStream();
        Writer writer = new OutputStreamWriter(ostream, "UTF8");
        writer.write(event.toString());
        writer.flush();
    }

    protected abstract Socket createSocket(Service service) throws IOException;

    public Args getArgs() {
        return args;
    }

    /* (non-Javadoc)
     * @see org.springframework.context.Lifecycle#start()
     */
    public synchronized void start() {
        try {
            service = serviceFactory.getService();
            socket = createSocket(service);

        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        this.running = true;
    }

    /* (non-Javadoc)
     * @see org.springframework.context.Lifecycle#stop()
     */
    public synchronized void stop() {
        if (!running) {
            return;
        }
        try {
            if (socket != null) {
                socket.close();
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

        this.running = false;
    }

    /* (non-Javadoc)
     * @see org.springframework.context.Lifecycle#isRunning()
     */
    public boolean isRunning() {
        return this.running;
    }

    /* (non-Javadoc)
     * @see org.springframework.context.Phased#getPhase()
     */
    public int getPhase() {
        return this.phase;
    }

    public void setPhase(int phase) {
        this.phase = phase;
    }

    /* (non-Javadoc)
     * @see org.springframework.context.SmartLifecycle#isAutoStartup()
     */
    public boolean isAutoStartup() {
        return this.autoStartup;
    }

    public void setAutoStartup(boolean autoStartup) {
        this.autoStartup = autoStartup;
    }

    /* (non-Javadoc)
     * @see org.springframework.context.SmartLifecycle#stop(java.lang.Runnable)
     */
    public synchronized void stop(Runnable callback) {
        this.stop();
        callback.run();
    }
}