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From tillrohrmann <...@git.apache.org>
Subject [GitHub] flink pull request #4261: [FLINK-7082] Add generic entry point for session a...
Date Wed, 26 Jul 2017 09:12:15 GMT
Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4261#discussion_r129519933
  
    --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/entrypoint/ClusterEntrypoint.java
---
    @@ -0,0 +1,247 @@
    +/*
    + * 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.flink.runtime.entrypoint;
    +
    +import org.apache.flink.api.common.time.Time;
    +import org.apache.flink.api.java.utils.ParameterTool;
    +import org.apache.flink.configuration.Configuration;
    +import org.apache.flink.configuration.GlobalConfiguration;
    +import org.apache.flink.configuration.JobManagerOptions;
    +import org.apache.flink.runtime.akka.AkkaUtils;
    +import org.apache.flink.runtime.blob.BlobServer;
    +import org.apache.flink.runtime.clusterframework.BootstrapTools;
    +import org.apache.flink.runtime.heartbeat.HeartbeatServices;
    +import org.apache.flink.runtime.highavailability.HighAvailabilityServices;
    +import org.apache.flink.runtime.highavailability.HighAvailabilityServicesUtils;
    +import org.apache.flink.runtime.metrics.MetricRegistry;
    +import org.apache.flink.runtime.metrics.MetricRegistryConfiguration;
    +import org.apache.flink.runtime.rpc.FatalErrorHandler;
    +import org.apache.flink.runtime.rpc.RpcService;
    +import org.apache.flink.runtime.rpc.akka.AkkaRpcService;
    +import org.apache.flink.runtime.security.SecurityContext;
    +import org.apache.flink.runtime.security.SecurityUtils;
    +import org.apache.flink.util.ExceptionUtils;
    +import org.apache.flink.util.FlinkException;
    +
    +import akka.actor.ActorSystem;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import javax.annotation.concurrent.GuardedBy;
    +
    +import java.util.concurrent.Callable;
    +import java.util.concurrent.Executor;
    +
    +import scala.concurrent.duration.FiniteDuration;
    +
    +/**
    + * Base class for the Flink cluster entry points.
    + *
    + * <p>Specialization of this class can be used for the session mode and the per-job
mode
    + */
    +public abstract class ClusterEntrypoint implements FatalErrorHandler {
    +
    +	protected static final Logger LOG = LoggerFactory.getLogger(ClusterEntrypoint.class);
    +
    +	protected static final int SUCCESS_RETURN_CODE = 0;
    +	protected static final int STARTUP_FAILURE_RETURN_CODE = 1;
    +	protected static final int RUNTIME_FAILURE_RETURN_CODE = 2;
    +
    +	/** The lock to guard startup / shutdown / manipulation methods. */
    +	private final Object lock = new Object();
    +
    +	@GuardedBy("lock")
    +	private MetricRegistry metricRegistry = null;
    +
    +	@GuardedBy("lock")
    +	private HighAvailabilityServices haServices = null;
    +
    +	@GuardedBy("lock")
    +	private BlobServer blobServer = null;
    +
    +	@GuardedBy("lock")
    +	private HeartbeatServices heartbeatServices = null;
    +
    +	@GuardedBy("lock")
    +	private RpcService commonRpcService = null;
    +
    +	protected void startCluster(String[] args) {
    +		final ClusterConfiguration clusterConfiguration = parseArguments(args);
    +
    +		final Configuration configuration = loadConfiguration(clusterConfiguration);
    +
    +		try {
    +			SecurityContext securityContext = installSecurityContext(configuration);
    +
    +			securityContext.runSecured(new Callable<Void>() {
    +				@Override
    +				public Void call() throws Exception {
    +					runCluster(configuration);
    +
    +					return null;
    +				}
    +			});
    +		} catch (Throwable t) {
    +			LOG.error("Cluster initialization failed.", t);
    +
    +			try {
    +				shutDown(false);
    +			} catch (Throwable st) {
    +				LOG.error("Could not properly shut down cluster entrypoint.", st);
    +			}
    +
    +			System.exit(STARTUP_FAILURE_RETURN_CODE);
    +		}
    +	}
    +
    +	protected ClusterConfiguration parseArguments(String[] args) {
    +		ParameterTool parameterTool = ParameterTool.fromArgs(args);
    +
    +		final String configDir = parameterTool.get("configDir", "");
    +
    +		return new ClusterConfiguration(configDir);
    +	}
    +
    +	protected Configuration loadConfiguration(ClusterConfiguration clusterConfiguration)
{
    --- End diff --
    
    Follow-up JIRA: https://issues.apache.org/jira/browse/FLINK-7270


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