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[FLINK-14992][client] Add job listener to execution environments
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flink-core/src/main/java/org/apache/flink/core/execution/JobListener.java
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/* | ||
* 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:https://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. | ||
*/ | ||
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package org.apache.flink.core.execution; | ||
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import org.apache.flink.annotation.PublicEvolving; | ||
import org.apache.flink.api.common.JobExecutionResult; | ||
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import javax.annotation.Nullable; | ||
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/** | ||
* A listener that is notified on specific job status changed, which should be firstly | ||
* registered by {@code #registerJobListener} of execution environments. | ||
* | ||
* <p>It is highly recommended NOT to perform any blocking operation inside | ||
* the callbacks. If you block the thread the invoker of environment execute methods | ||
* is possibly blocked. | ||
*/ | ||
@PublicEvolving | ||
public interface JobListener { | ||
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/** | ||
* Callback on job submission. This is called when {@code execute()} or {@code executeAsync()} | ||
* is called. | ||
* | ||
* <p>Exactly one of the passed parameters is null, respectively for failure or success. | ||
* | ||
* @param jobClient a {@link JobClient} for the submitted Flink job | ||
* @param throwable the cause if submission failed | ||
*/ | ||
void onJobSubmitted(@Nullable JobClient jobClient, @Nullable Throwable throwable); | ||
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/** | ||
* Callback on job execution finished, successfully or unsuccessfully. It is only called | ||
* back when you call {@code execute()} instead of {@code executeAsync()} methods of execution | ||
* environments. | ||
* | ||
* <p>Exactly one of the passed parameters is null, respectively for failure or success. | ||
*/ | ||
void onJobExecuted(@Nullable JobExecutionResult jobExecutionResult, @Nullable Throwable throwable); | ||
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} |
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