| /* |
| * 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.client.program; |
| |
| import org.apache.flink.api.common.JobExecutionResult; |
| import org.apache.flink.api.common.JobID; |
| import org.apache.flink.api.common.Plan; |
| import org.apache.flink.api.java.ExecutionEnvironment; |
| import org.apache.flink.api.java.ExecutionEnvironmentFactory; |
| import org.apache.flink.optimizer.Optimizer; |
| import org.apache.flink.optimizer.plan.FlinkPlan; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.PrintStream; |
| |
| /** |
| * An {@link ExecutionEnvironment} that never executes a job but only creates the optimized plan. |
| */ |
| public class OptimizerPlanEnvironment extends ExecutionEnvironment { |
| |
| private final Optimizer compiler; |
| |
| private FlinkPlan optimizerPlan; |
| |
| public OptimizerPlanEnvironment(Optimizer compiler) { |
| this.compiler = compiler; |
| } |
| |
| // ------------------------------------------------------------------------ |
| // Execution Environment methods |
| // ------------------------------------------------------------------------ |
| |
| @Override |
| public JobExecutionResult executeInternal(String jobName, boolean detached) throws Exception { |
| Plan plan = createProgramPlan(jobName); |
| this.optimizerPlan = compiler.compile(plan); |
| |
| // do not go on with anything now! |
| throw new ProgramAbortException(); |
| } |
| |
| @Override |
| public void cancel(JobID jobId) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void stop() { |
| |
| } |
| |
| @Override |
| public String getExecutionPlan() throws Exception { |
| Plan plan = createProgramPlan(null, false); |
| this.optimizerPlan = compiler.compile(plan); |
| |
| // do not go on with anything now! |
| throw new ProgramAbortException(); |
| } |
| |
| @Override |
| public void startNewSession() { |
| // do nothing |
| } |
| |
| public FlinkPlan getOptimizedPlan(PackagedProgram prog) throws ProgramInvocationException { |
| |
| // temporarily write syserr and sysout to a byte array. |
| PrintStream originalOut = System.out; |
| PrintStream originalErr = System.err; |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| System.setOut(new PrintStream(baos)); |
| ByteArrayOutputStream baes = new ByteArrayOutputStream(); |
| System.setErr(new PrintStream(baes)); |
| |
| setAsContext(); |
| try { |
| prog.invokeInteractiveModeForExecution(); |
| } |
| catch (ProgramInvocationException e) { |
| throw e; |
| } |
| catch (Throwable t) { |
| // the invocation gets aborted with the preview plan |
| if (optimizerPlan != null) { |
| return optimizerPlan; |
| } else { |
| throw new ProgramInvocationException("The program caused an error: ", t); |
| } |
| } |
| finally { |
| unsetAsContext(); |
| System.setOut(originalOut); |
| System.setErr(originalErr); |
| } |
| |
| String stdout = baos.toString(); |
| String stderr = baes.toString(); |
| |
| throw new ProgramInvocationException( |
| "The program plan could not be fetched - the program aborted pre-maturely." |
| + "\n\nSystem.err: " + (stdout.length() == 0 ? "(none)" : stdout) |
| + "\n\nSystem.out: " + (stderr.length() == 0 ? "(none)" : stderr)); |
| } |
| // ------------------------------------------------------------------------ |
| |
| private void setAsContext() { |
| ExecutionEnvironmentFactory factory = new ExecutionEnvironmentFactory() { |
| |
| @Override |
| public ExecutionEnvironment createExecutionEnvironment() { |
| return OptimizerPlanEnvironment.this; |
| } |
| }; |
| initializeContextEnvironment(factory); |
| } |
| |
| private void unsetAsContext() { |
| resetContextEnvironment(); |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| public void setPlan(FlinkPlan plan){ |
| this.optimizerPlan = plan; |
| } |
| |
| /** |
| * A special exception used to abort programs when the caller is only interested in the |
| * program plan, rather than in the full execution. |
| */ |
| public static final class ProgramAbortException extends Error { |
| private static final long serialVersionUID = 1L; |
| } |
| } |