io.fabric8.elasticsearch.plugin.OpenShiftElasticSearchService Maven / Gradle / Ivy

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/**
 * Copyright (C) 2015 Red Hat, Inc.
 *
 * 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 io.fabric8.elasticsearch.plugin;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.component.AbstractLifecycleComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.EsExecutors;
import org.elasticsearch.common.util.concurrent.FutureUtils;
import org.elasticsearch.rest.RestController;

import io.fabric8.elasticsearch.plugin.acl.DynamicACLFilter;
import io.fabric8.elasticsearch.plugin.acl.UserProjectCache;

/**
 * Service to handle spawning threads, lifecycles, and REST filter registrations
 * 
 * @author jeff.cantrill
 *
 */
public class OpenShiftElasticSearchService extends AbstractLifecycleComponent
        implements ConfigurationSettings {

    private final ESLogger logger;
    private final UserProjectCache cache;
    private final Settings settings;
    private ScheduledThreadPoolExecutor scheduler;

    @SuppressWarnings("rawtypes")
    private ScheduledFuture scheduledFuture;

    @Inject
    public OpenShiftElasticSearchService(final Settings settings, final Client esClient,
            final RestController restController, final UserProjectCache cache, final DynamicACLFilter aclFilter) {
        super(settings);
        this.settings = settings;
        this.logger = Loggers.getLogger(getClass(), settings);
        this.cache = cache;
        restController.registerFilter(aclFilter);
    }

    @Override
    protected void doStart() throws ElasticsearchException {

        boolean dynamicEnabled = settings.getAsBoolean(OPENSHIFT_DYNAMIC_ENABLED_FLAG,
                OPENSHIFT_DYNAMIC_ENABLED_DEFAULT);
        logger.debug("Starting with Dynamic ACL feature enabled: {}", dynamicEnabled);

        if (dynamicEnabled) {
            // expiration thread
            logger.debug("Starting the expiration thread...");
            this.scheduler = (ScheduledThreadPoolExecutor) Executors.newScheduledThreadPool(1,
                    EsExecutors.daemonThreadFactory(settings, "openshift_elasticsearch_service"));
            this.scheduler.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
            this.scheduler.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);

            Runnable expire = new Runnable() {
                @Override
                public void run() {
                    cache.expire();
                }
            };
            this.scheduledFuture = this.scheduler.scheduleWithFixedDelay(expire, 5, 60, TimeUnit.SECONDS);
        }

        logger.debug("Started");

    }

    @Override
    protected void doStop() throws ElasticsearchException {
        // cleanup expire thread
        FutureUtils.cancel(this.scheduledFuture);
        if (scheduler != null) {
            this.scheduler.shutdown();
        }
        logger.debug("Stopped");
    }

    @Override
    protected void doClose() throws ElasticsearchException {
        FutureUtils.cancel(this.scheduledFuture);
        if (this.scheduler != null) {
            this.scheduler.shutdown();
        }
        logger.debug("Closed");
    }

}