com.spotify.helios.agent.EnvironmentVariableReporter Maven / Gradle / Ivy
/*
* Copyright (c) 2014 Spotify AB.
*
* 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.spotify.helios.agent;
import com.spotify.helios.common.Json;
import com.spotify.helios.servicescommon.coordination.NodeUpdaterFactory;
import com.spotify.helios.servicescommon.coordination.Paths;
import com.spotify.helios.servicescommon.coordination.ZooKeeperNodeUpdater;
import java.util.Map;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
/**
* Puts the environment variables the Agent has been configured to set in all child containers
* into ZK so they can be visible to the master and via the API.
*/
public class EnvironmentVariableReporter extends InterruptingScheduledService {
private static final int RETRY_INTERVAL_MILLIS = 1000;
private final Map envVars;
private final ZooKeeperNodeUpdater nodeUpdater;
public EnvironmentVariableReporter(final String host, final Map envVars,
final NodeUpdaterFactory nodeUpdaterFactory) {
this.envVars = envVars;
this.nodeUpdater = nodeUpdaterFactory.create(Paths.statusHostEnvVars(host));
}
@Override
protected void runOneIteration() {
final boolean succesful = nodeUpdater.update(Json.asBytesUnchecked(envVars));
if (succesful) {
stopAsync();
}
}
@Override
protected ScheduledFuture schedule(final Runnable runnable,
final ScheduledExecutorService executorService) {
return executorService.scheduleWithFixedDelay(runnable, 0, RETRY_INTERVAL_MILLIS, MILLISECONDS);
}
}