Github user mxm commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2732#discussion_r89137404
  
    --- Diff: 
flink-core/src/main/java/org/apache/flink/api/common/JobClient.java ---
    @@ -0,0 +1,70 @@
    +/*
    + * 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.api.common;
    +
    +import java.util.Map;
    +
    +/*
    + * An Flink job client interface to interact with running Flink jobs.
    + */
    +public interface JobClient {
    +
    +   /**
    +    * Gets the JobID associated with this JobClient.
    +    */
    +   JobID getJobID();
    +
    +   /**
    +    * Returns a boolean indicating whether the job execution has finished.
    +    */
    +   boolean hasFinished() throws Exception;
    +
    +   /**
    +    * Blocks until the result of the job execution is returned.
    +    */
    +   JobExecutionResult waitForResult() throws Exception;
    +
    +   /**
    +    * Gets the accumulator map of a running job.
    +    */
    +   Map<String, Object> getAccumulators() throws Exception;
    +
    +   /**
    +    * Cancels a running job.
    +    */
    +   void cancel() throws Exception;
    +
    +   /**
    +    * Stops a running job if the job supports stopping.
    +    */
    +   void stop() throws Exception;
    +
    +   /**
    +    * Adds a Runnable to this JobClient to be called
    +    * when the client is shut down. Runnables are called
    +    * in the order they are added.
    +    */
    +   void addFinalizer(Runnable finalizer) throws Exception;
    --- End diff --
    
    Yes, that's an issue with sharing the interface across modules. Let me try 
to get rid of it for the base interface.


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