myriad-scheduler/src/main/java/org/apache/myriad/MesosModule.java

/**
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.myriad;

import com.google.inject.AbstractModule;
import com.google.inject.Provides;
import com.google.inject.Scopes;
import com.google.inject.Singleton;
import com.google.protobuf.ByteString;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import org.apache.commons.lang.StringUtils;
import org.apache.mesos.MesosSchedulerDriver;
import org.apache.mesos.Protos.Credential;
import org.apache.mesos.Protos.FrameworkID;
import org.apache.mesos.Protos.FrameworkInfo;
import org.apache.mesos.Protos.FrameworkInfo.Builder;
import org.apache.mesos.SchedulerDriver;
import org.apache.mesos.state.State;
import org.apache.mesos.state.ZooKeeperState;
import org.apache.myriad.configuration.MyriadConfiguration;
import org.apache.myriad.scheduler.MyriadDriver;
import org.apache.myriad.scheduler.MyriadScheduler;
import org.apache.myriad.state.SchedulerState;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Guice Module for Mesos objects.
 */
public class MesosModule extends AbstractModule {
  private static final Logger LOGGER = LoggerFactory.getLogger(MesosModule.class);

  public MesosModule() {
  }

  @Override
  protected void configure() {
    bind(MyriadDriver.class).in(Scopes.SINGLETON);
  }

  @Provides
  @Singleton
  SchedulerDriver providesSchedulerDriver(MyriadScheduler scheduler, MyriadConfiguration cfg, SchedulerState schedulerState) {

    Builder frameworkInfoBuilder = FrameworkInfo.newBuilder().setUser("").setName(cfg.getFrameworkName()).setCheckpoint(
        cfg.isCheckpoint()).setFailoverTimeout(cfg.getFrameworkFailoverTimeout());

    if (StringUtils.isNotEmpty(cfg.getFrameworkRole())) {
      frameworkInfoBuilder.setRole(cfg.getFrameworkRole());
    }

    FrameworkID frameworkId = schedulerState.getFrameworkID();
    if (frameworkId != null) {
      LOGGER.info("Attempting to re-register with frameworkId: {}", frameworkId.getValue());
      frameworkInfoBuilder.setId(frameworkId);
    }

    String mesosAuthenticationPrincipal = cfg.getMesosAuthenticationPrincipal();
    String mesosAuthenticationSecretFilename = cfg.getMesosAuthenticationSecretFilename();
    if (StringUtils.isNotEmpty(mesosAuthenticationPrincipal)) {
      frameworkInfoBuilder.setPrincipal(mesosAuthenticationPrincipal);

      Credential.Builder credentialBuilder = Credential.newBuilder();
      credentialBuilder.setPrincipal(mesosAuthenticationPrincipal);
      if (StringUtils.isNotEmpty(mesosAuthenticationSecretFilename)) {
        try {
          credentialBuilder.setSecretBytes(ByteString.readFrom(new FileInputStream(mesosAuthenticationSecretFilename)));
        } catch (FileNotFoundException ex) {
          LOGGER.error("Mesos authentication secret file was not found", ex);
          throw new RuntimeException(ex);
        } catch (IOException ex) {
          LOGGER.error("Error reading Mesos authentication secret file", ex);
          throw new RuntimeException(ex);
        }
      }
      return new MesosSchedulerDriver(scheduler, frameworkInfoBuilder.build(), cfg.getMesosMaster(), credentialBuilder.build());
    } else {
      return new MesosSchedulerDriver(scheduler, frameworkInfoBuilder.build(), cfg.getMesosMaster());
    }
  }

  @Provides
  @Singleton
  State providesStateStore(MyriadConfiguration cfg) {
    return new ZooKeeperState(cfg.getZkServers(), cfg.getZkTimeout(), TimeUnit.MILLISECONDS, "/myriad/" + cfg.getFrameworkName());
  }
}