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Merge pull request apache#1403 from metamx/mergerMakerTests
Improvements around resource handling in IndexMerger / IndexIO / QueryableIndex
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103 changes: 103 additions & 0 deletions
103
processing/src/test/java/io/druid/segment/CloserRule.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| /* | ||
| * Licensed to Metamarkets Group Inc. (Metamarkets) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. Metamarkets 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. | ||
| */ | ||
|
|
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| package io.druid.segment; | ||
|
|
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| import com.metamx.common.logger.Logger; | ||
| import org.junit.rules.TestRule; | ||
| import org.junit.runner.Description; | ||
| import org.junit.runners.model.Statement; | ||
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|
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| import java.io.Closeable; | ||
| import java.io.IOException; | ||
| import java.util.LinkedList; | ||
| import java.util.List; | ||
|
|
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| public class CloserRule implements TestRule | ||
| { | ||
| private final boolean throwException; | ||
|
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| public CloserRule(boolean throwException) | ||
| { | ||
| this.throwException = throwException; | ||
| } | ||
|
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| private static final Logger log = new Logger(CloserRule.class); | ||
| private final List<AutoCloseable> autoCloseables = new LinkedList<>(); | ||
|
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| @Override | ||
| public Statement apply( | ||
| final Statement base, Description description | ||
| ) | ||
| { | ||
| return new Statement() | ||
| { | ||
| @Override | ||
| public void evaluate() throws Throwable | ||
| { | ||
| Throwable baseThrown = null; | ||
| try { | ||
| base.evaluate(); | ||
| } | ||
| catch (Throwable e) { | ||
| baseThrown = e; | ||
| } | ||
| finally { | ||
| Throwable exception = null; | ||
| for (AutoCloseable autoCloseable : autoCloseables) { | ||
| try { | ||
| autoCloseable.close(); | ||
| } | ||
| catch (Exception e) { | ||
| exception = suppressOrSet(exception, e); | ||
| } | ||
| } | ||
| autoCloseables.clear(); | ||
| if (exception != null) { | ||
| if (throwException && baseThrown == null) { | ||
| throw exception; | ||
| } else if (baseThrown != null) { | ||
| baseThrown.addSuppressed(exception); | ||
| } else { | ||
| log.error(exception, "Exception closing resources"); | ||
| } | ||
| } | ||
| if (baseThrown != null) { | ||
| throw baseThrown; | ||
| } | ||
| } | ||
| } | ||
| }; | ||
| } | ||
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| private static Throwable suppressOrSet(Throwable prior, Throwable other) | ||
| { | ||
| if (prior == null) { | ||
| prior = new IOException("Error closing resources"); | ||
| } | ||
| prior.addSuppressed(other); | ||
| return prior; | ||
| } | ||
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| public <T extends AutoCloseable> T closeLater(T autoCloseable) | ||
| { | ||
| autoCloseables.add(autoCloseable); | ||
| return autoCloseable; | ||
| } | ||
| } |
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