org.apache.ambari.servicemonitor.probes.PortProbe.java Source code

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Here is the source code for org.apache.ambari.servicemonitor.probes.PortProbe.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 org.apache.ambari.servicemonitor.probes;

import org.apache.ambari.servicemonitor.reporting.ProbeStatus;
import org.apache.ambari.servicemonitor.utils.MonitorUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.IOUtils;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;

/**
 * Probe for a port being open
 */
public class PortProbe extends Probe {
    private static final Log LOG = LogFactory.getLog(PortProbe.class);

    private String host;
    private int port;
    private int timeout;

    public PortProbe(String host, int port, int timeout, String name, Configuration conf) throws IOException {
        super("Port probe " + name + " " + host + ":" + port + " for " + timeout + "ms", conf);
        this.host = host;
        this.port = port;
        this.timeout = timeout;
    }

    public static PortProbe createPortProbe(Configuration conf, String hostname, int port) throws IOException {
        PortProbe portProbe = new PortProbe(hostname, port,
                conf.getInt(PORT_PROBE_CONNECT_TIMEOUT, PORT_PROBE_CONNECT_TIMEOUT_DEFAULT), "", conf);

        return portProbe;
    }

    @Override
    public void init() throws IOException {
        if (port >= 65536) {
            throw new IOException("Port is out of range: " + port);
        }
        InetAddress target;
        if (host != null) {
            LOG.debug("looking up host " + host);
            target = InetAddress.getByName(host);
        } else {
            LOG.debug("Host is null, retrieving localhost address");
            target = InetAddress.getLocalHost();
        }
        LOG.info("Checking " + target + ":" + port);
    }

    /**
     * Try to connect to the (host,port); a failure to connect within
     * the specified timeout is a failure
     * @param livePing is the ping live: true for live; false for boot time
     * @return the outcome
     */
    @Override
    public ProbeStatus ping(boolean livePing) {
        ProbeStatus status = new ProbeStatus();
        InetSocketAddress sockAddr = new InetSocketAddress(host, port);
        Socket socket = new Socket();
        try {
            if (LOG.isDebugEnabled()) {
                LOG.debug("Connecting to " + sockAddr.toString() + " connection-timeout="
                        + MonitorUtils.millisToHumanTime(timeout));
            }
            socket.connect(sockAddr, timeout);
            status.succeed(this);
        } catch (IOException e) {
            String error = "Probe " + sockAddr + " failed: " + e;
            LOG.debug(error, e);
            status.fail(this, new IOException(error, e));
        } finally {
            IOUtils.closeSocket(socket);
        }
        return status;

    }
}