brooklyn.entity.monitoring.monit.MonitNodeImpl.java Source code

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Here is the source code for brooklyn.entity.monitoring.monit.MonitNodeImpl.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 brooklyn.entity.monitoring.monit;

import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import brooklyn.entity.Entity;
import brooklyn.entity.basic.SoftwareProcessImpl;
import brooklyn.event.feed.ssh.SshFeed;
import brooklyn.event.feed.ssh.SshPollConfig;
import brooklyn.event.feed.ssh.SshPollValue;
import brooklyn.location.Location;
import brooklyn.location.basic.SshMachineLocation;
import brooklyn.util.text.Strings;
import brooklyn.util.time.Duration;

import com.google.common.base.Function;
import com.google.common.collect.Iterables;

public class MonitNodeImpl extends SoftwareProcessImpl implements MonitNode {

    private static final Logger LOG = LoggerFactory.getLogger(MonitNodeImpl.class);

    private SshFeed feed;

    public MonitNodeImpl() {
    }

    public MonitNodeImpl(Map flags) {
        super(flags, null);
    }

    public MonitNodeImpl(Map flags, Entity parent) {
        super(flags, parent);
    }

    @Override
    public Class getDriverInterface() {
        return MonitDriver.class;
    }

    @Override
    public MonitDriver getDriver() {
        return (MonitDriver) super.getDriver();
    }

    @Override
    protected void connectSensors() {
        super.connectSensors();
        Location machine = Iterables.get(getLocations(), 0, null);

        if (machine instanceof SshMachineLocation) {
            String cmd = getDriver().getStatusCmd();
            feed = SshFeed.builder().entity(this).period(Duration.FIVE_SECONDS)
                    .machine((SshMachineLocation) machine)
                    .poll(new SshPollConfig<Boolean>(SERVICE_UP).command(cmd).setOnSuccess(true)
                            .setOnFailureOrException(false))
                    .poll(new SshPollConfig<String>(MONIT_TARGET_PROCESS_NAME).command(cmd)
                            .onSuccess(new Function<SshPollValue, String>() {
                                @Override
                                public String apply(SshPollValue input) {
                                    String process = Strings.getFirstWordAfter(input.getStdout(), "Process");
                                    return process;
                                }
                            }).setOnFailureOrException(null))
                    .poll(new SshPollConfig<String>(MONIT_TARGET_PROCESS_STATUS).command(cmd)
                            .onSuccess(new Function<SshPollValue, String>() {
                                @Override
                                public String apply(SshPollValue input) {
                                    return Strings
                                            .trim(Strings.getRemainderOfLineAfter(input.getStdout(), "status"));
                                }
                            }).setOnFailureOrException(null))
                    .build();
        } else {
            LOG.warn(
                    "Location(s) {} not an ssh-machine location, so not polling for status; setting serviceUp immediately",
                    getLocations());
            setAttribute(SERVICE_UP, true);
        }
    }

    @Override
    protected void disconnectSensors() {
        if (feed != null)
            feed.stop();
    }

    @Override
    public String getShortName() {
        return "Monit";
    }
}