DefaultDiscoveryModule.java

/*
 * Licensed to ElasticSearch and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. ElasticSearch 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.elasticsearch.discovery;

import com.google.common.collect.ImmutableList;
import org.elasticsearch.common.inject.AbstractModule;
import org.elasticsearch.common.inject.Module;
import org.elasticsearch.common.inject.Modules;
import org.elasticsearch.common.inject.SpawnModules;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.discovery.local.LocalDiscoveryModule;

/**
 *
 */
public class DefaultDiscoveryModule extends AbstractModule implements SpawnModules {

    private final Settings settings;
    
    public DefaultDiscoveryModule(Settings settings) {
        this.settings = settings;
    }

    @Override
    public Iterable<? extends Module> spawnModules() {
        ImmutableList.Builder<Module> builder = ImmutableList.builder();
        if (settings.getAsBoolean("node.local", false)) {
            // local discovery only
            builder.add(Modules.createModule(settings.getAsClass("discovery.type", LocalDiscoveryModule.class, "org.elasticsearch.discovery.", "DiscoveryModule"), settings));
        } else {
            // ask service loader for discovery modules
            for (DiscoveryModule m : DiscoveryFactory.discoveries) {
                builder.add(m);
            }
        }
        return builder.build();
    }

    @Override
    protected void configure() {
        bind(DiscoveryService.class).asEagerSingleton();
    }
}