org.apache.hadoop.yarn.server.api.ServerRMProxy.java Source code

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Here is the source code for org.apache.hadoop.yarn.server.api.ServerRMProxy.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.hadoop.yarn.server.api;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.client.RMProxy;
import org.apache.hadoop.yarn.conf.YarnConfiguration;

import com.google.common.base.Preconditions;
import io.hops.util.GroupMembership;
import org.apache.hadoop.net.NetUtils;

public class ServerRMProxy<T> extends RMProxy<T> {
    private static final Log LOG = LogFactory.getLog(ServerRMProxy.class);
    private static final ServerRMProxy INSTANCE = new ServerRMProxy();

    private ServerRMProxy() {
        super();
    }

    /**
     * Create a proxy to the ResourceManager for the specified protocol.
     * @param configuration Configuration with all the required information.
     * @param protocol Server protocol for which proxy is being requested.
     * @param <T> Type of proxy.
     * @return Proxy to the ResourceManager for the specified server protocol.
     * @throws IOException
     */
    public static <T> T createRMProxy(final Configuration configuration, final Class<T> protocol, boolean toLeader)
            throws IOException {
        long rmConnectWait = configuration.getLong(YarnConfiguration.RESOURCEMANAGER_CONNECT_MAX_WAIT_MS,
                YarnConfiguration.DEFAULT_RESOURCEMANAGER_CONNECT_MAX_WAIT_MS);
        long rmRetryInterval = configuration.getLong(YarnConfiguration.RESOURCEMANAGER_CONNECT_RETRY_INTERVAL_MS,
                YarnConfiguration.DEFAULT_RESOURCEMANAGER_CONNECT_RETRY_INTERVAL_MS);
        long nmRmConnectWait = configuration.getLong(YarnConfiguration.NM_RESOURCEMANAGER_CONNECT_MAX_WAIT_MS,
                rmConnectWait);
        long nmRmRetryInterval = configuration
                .getLong(YarnConfiguration.NM_RESOURCEMANAGER_CONNECT_RETRY_INTERVAL_MS, rmRetryInterval);
        return createRMProxy(configuration, protocol, INSTANCE, nmRmConnectWait, nmRmRetryInterval, toLeader);
    }

    @InterfaceAudience.Private
    @Override
    protected InetSocketAddress getRMAddress(YarnConfiguration conf, Class<?> protocol) {
        if (protocol == ResourceTracker.class) {
            return conf.getSocketAddr(YarnConfiguration.RM_RESOURCE_TRACKER_ADDRESS,
                    YarnConfiguration.DEFAULT_RM_RESOURCE_TRACKER_ADDRESS,
                    YarnConfiguration.DEFAULT_RM_RESOURCE_TRACKER_PORT);
        } else if (protocol == GroupMembership.class) {
            return conf.getSocketAddr(YarnConfiguration.RM_GROUP_MEMBERSHIP_ADDRESS,
                    YarnConfiguration.DEFAULT_RM_GROUP_MEMBERSHIP_ADDRESS,
                    YarnConfiguration.DEFAULT_RM_GROUP_MEMBERSHIP_PORT);
        } else {
            String message = "Unsupported protocol found when creating the proxy "
                    + "connection to ResourceManager: "
                    + ((protocol != null) ? protocol.getClass().getName() : "null");
            LOG.error(message);
            throw new IllegalStateException(message);
        }
    }

    protected InetSocketAddress getRMAddress(YarnConfiguration conf, Class<?> protocol, String host) {
        if (protocol == ResourceTracker.class) {
            return conf.getSocketAddr(YarnConfiguration.RM_RESOURCE_TRACKER_ADDRESS,
                    YarnConfiguration.DEFAULT_RM_RESOURCE_TRACKER_ADDRESS,
                    YarnConfiguration.DEFAULT_RM_RESOURCE_TRACKER_PORT, host);
        } else if (protocol == GroupMembership.class) {
            return conf.getSocketAddr(YarnConfiguration.RM_GROUP_MEMBERSHIP_ADDRESS,
                    YarnConfiguration.DEFAULT_RM_GROUP_MEMBERSHIP_ADDRESS,
                    YarnConfiguration.DEFAULT_RM_GROUP_MEMBERSHIP_PORT, host);
        } else {
            String message = "Unsupported protocol found when creating the proxy "
                    + "connection to ResourceManager: "
                    + ((protocol != null) ? protocol.getClass().getName() : "null");
            LOG.error(message);
            throw new IllegalStateException(message);
        }
    }

    @InterfaceAudience.Private
    @Override
    protected void checkAllowedProtocols(Class<?> protocol) {
        Preconditions.checkArgument(protocol.isAssignableFrom(ResourceTracker.class),
                "ResourceManager does not support this protocol");
    }
}