/*
 * 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.beam.runners.flink;

import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.PipelineResult;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.options.PipelineOptionsValidator;
import org.apache.beam.sdk.runners.PipelineRunner;
import org.apache.beam.sdk.transforms.PTransform;
import org.apache.beam.sdk.values.PInput;
import org.apache.beam.sdk.values.POutput;

/**
 * Test Flink runner.
 */
public class TestFlinkRunner extends PipelineRunner<PipelineResult> {

  private FlinkRunner delegate;

  private TestFlinkRunner(FlinkPipelineOptions options) {
    // We use [auto] for testing since this will make it pick up the Testing ExecutionEnvironment
    options.setFlinkMaster("[auto]");
    this.delegate = FlinkRunner.fromOptions(options);
  }

  public static TestFlinkRunner fromOptions(PipelineOptions options) {
    FlinkPipelineOptions flinkOptions =
        PipelineOptionsValidator.validate(FlinkPipelineOptions.class, options);
    return new TestFlinkRunner(flinkOptions);
  }

  public static TestFlinkRunner create(boolean streaming) {
    FlinkPipelineOptions flinkOptions = PipelineOptionsFactory.as(FlinkPipelineOptions.class);
    flinkOptions.setRunner(TestFlinkRunner.class);
    flinkOptions.setStreaming(streaming);
    return TestFlinkRunner.fromOptions(flinkOptions);
  }

  @Override
  public <OutputT extends POutput, InputT extends PInput>
      OutputT apply(PTransform<InputT, OutputT> transform, InputT input) {
    return delegate.apply(transform, input);
  }

  @Override
  public PipelineResult run(Pipeline pipeline) {
    try {
      return delegate.run(pipeline);
    } catch (Throwable e) {
      // Special case hack to pull out assertion errors from PAssert; instead there should
      // probably be a better story along the lines of UserCodeException.
      Throwable cause = e;
      Throwable oldCause = e;
      do {
        if (cause.getCause() == null) {
          break;
        }

        oldCause = cause;
        cause = cause.getCause();

      } while (!oldCause.equals(cause));
      if (cause instanceof AssertionError) {
        throw (AssertionError) cause;
      } else {
        throw e;
      }
    }
  }

  public PipelineOptions getPipelineOptions() {
    return delegate.getPipelineOptions();
  }
}



@@ -876,16 +876,80 @@
 peline;%0A
+import org.apache.beam.sdk.Pipeline.PipelineExecutionException;%0A
 import o
@@ -1256,16 +1256,67 @@
 nsform;%0A
+import org.apache.beam.sdk.util.UserCodeException;%0A
 import o
@@ -2892,12 +2892,286 @@
     
-do %7B
+PipelineExecutionException executionException = null;%0A      do %7B%0A%0A        // find UserCodeException and throw PipelineExecutionException%0A        if (cause instanceof UserCodeException) %7B%0A          executionException = new PipelineExecutionException(cause.getCause());%0A        %7D%0A
 %0A   
@@ -3435,16 +3435,113 @@
  else %7B%0A
+        if (executionException != null) %7B%0A          throw executionException;%0A        %7D else %7B%0A  
         
@@ -3545,24 +3545,34 @@
    throw e;%0A
+        %7D%0A
       %7D%0A    

fix TestFlinkRunner to throw PipelineExecutionException