ch.epfl.eagle.daemon.nodemonitor.NodeMonitorThrift.java Source code

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Here is the source code for ch.epfl.eagle.daemon.nodemonitor.NodeMonitorThrift.java

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/*
 * EAGLE 
 *
 * Copyright 2016 Operating Systems Laboratory EPFL
 *
 * Modified from Sparrow - University of California, Berkeley 
 * 
 * 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 ch.epfl.eagle.daemon.nodemonitor;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.util.List;

import org.apache.commons.configuration.Configuration;
import org.apache.thrift.TException;

import com.google.common.base.Optional;

import ch.epfl.eagle.daemon.EagleConf;
import ch.epfl.eagle.daemon.util.Serialization;
import ch.epfl.eagle.daemon.util.TServers;
import ch.epfl.eagle.thrift.InternalService;
import ch.epfl.eagle.thrift.NodeMonitorService;
import ch.epfl.eagle.thrift.TCancelTaskReservationsRequest;
import ch.epfl.eagle.thrift.TEnqueueTaskReservationsRequest;
import ch.epfl.eagle.thrift.TEnqueueTaskReservationsResponse;
import ch.epfl.eagle.thrift.TFullTaskId;

/**
 * This class extends the thrift Eagle node monitor interface. It wraps the
 * {@link NodeMonitor} class and delegates most calls to that class.
 */
public class NodeMonitorThrift implements NodeMonitorService.Iface, InternalService.Iface {
    // Defaults if not specified by configuration
    public final static int DEFAULT_NM_THRIFT_PORT = 20501;
    public final static int DEFAULT_NM_THRIFT_THREADS = 32;
    public final static int DEFAULT_INTERNAL_THRIFT_PORT = 20502;
    public final static int DEFAULT_INTERNAL_THRIFT_THREADS = 8;

    private NodeMonitor nodeMonitor = new NodeMonitor();
    // The socket addr (ip:port) where we listen for requests from other Eagle daemons.
    // Used when registering backends with the state store.
    private InetSocketAddress internalAddr;

    /**
     * Initialize this thrift service.
     *
     * This spawns 2 multi-threaded thrift servers, one exposing the app-facing
     * agent service and the other exposing the internal-facing agent service,
     * and listens for requests to both servers. We require explicit specification of the
     * ports for these respective interfaces, since they cannot always be determined from
     * within this class under certain configurations (e.g. a config file specifies
     * multiple NodeMonitors).
     */
    public void initialize(Configuration conf, int nmPort, int internalPort) throws IOException {
        nodeMonitor.initialize(conf, internalPort);

        // Setup application-facing agent service.
        NodeMonitorService.Processor<NodeMonitorService.Iface> processor = new NodeMonitorService.Processor<NodeMonitorService.Iface>(
                this);

        int threads = conf.getInt(EagleConf.NM_THRIFT_THREADS, DEFAULT_NM_THRIFT_THREADS);
        TServers.launchThreadedThriftServer(nmPort, threads, processor);

        // Setup internal-facing agent service.
        InternalService.Processor<InternalService.Iface> internalProcessor = new InternalService.Processor<InternalService.Iface>(
                this);
        int internalThreads = conf.getInt(EagleConf.INTERNAL_THRIFT_THREADS, DEFAULT_INTERNAL_THRIFT_THREADS);
        TServers.launchThreadedThriftServer(internalPort, internalThreads, internalProcessor);

        internalAddr = new InetSocketAddress(InetAddress.getLocalHost(), internalPort);
    }

    @Override
    public boolean registerBackend(String app, String backendSocket) throws TException {
        Optional<InetSocketAddress> backendAddr = Serialization.strToSocket(backendSocket);
        if (!backendAddr.isPresent()) {
            return false; // TODO: maybe we should throw some exception here?
        }
        return nodeMonitor.registerBackend(app, internalAddr, backendAddr.get());
    }

    @Override
    public void sendFrontendMessage(String app, TFullTaskId taskId, int status, ByteBuffer message)
            throws TException {
        nodeMonitor.sendFrontendMessage(app, taskId, status, message);
    }

    @Override
    public void tasksFinished(List<TFullTaskId> tasks) throws TException {
        nodeMonitor.tasksFinished(tasks);
    }

    @Override
    public boolean enqueueTaskReservations(TEnqueueTaskReservationsRequest request) throws TException {
        return nodeMonitor.enqueueTaskReservations(request);
    }

    @Override
    public boolean enqueueTasksCentralized(TEnqueueTaskReservationsRequest request, List<String> notExecutingLong,
            double longStatusTimestamp) throws TException {
        return nodeMonitor.enqueueTasksCentralized(request, notExecutingLong, longStatusTimestamp);
    }

    @Override
    public void cancelTaskReservations(TCancelTaskReservationsRequest request) throws TException {
        nodeMonitor.cancelTaskReservations(request.requestId);
    }

    /**
     * HAWK STEALING!!
     **/
    @Override
    public List<TEnqueueTaskReservationsRequest> sendTasksReservations() throws TException {
        return nodeMonitor.sendTaskReservations();
    }

    // EAGLE distributed schedulers get bitmap
    @Override
    public TEnqueueTaskReservationsResponse probeEnqueueTaskReservations(TEnqueueTaskReservationsRequest request)
            throws TException {
        return nodeMonitor.probeEnqueueTaskReservations(request);
    }

    // Gosipping
    @Override
    public void receiveGossip(List<String> notExecutingLong, double longStatusTimestamp, int round)
            throws TException {
        nodeMonitor.receiveGossip(notExecutingLong, longStatusTimestamp, round);
    }

}