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Merge pull request #430 from maryannxue/master
Issue #20 - hashjoin implementation
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76 changes: 76 additions & 0 deletions
76
src/main/java/com/salesforce/hbase/index/CapturingAbortable.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| /******************************************************************************* | ||
| * Copyright (c) 2013, Salesforce.com, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions are met: | ||
| * | ||
| * Redistributions of source code must retain the above copyright notice, | ||
| * this list of conditions and the following disclaimer. | ||
| * Redistributions in binary form must reproduce the above copyright notice, | ||
| * this list of conditions and the following disclaimer in the documentation | ||
| * and/or other materials provided with the distribution. | ||
| * Neither the name of Salesforce.com nor the names of its contributors may | ||
| * be used to endorse or promote products derived from this software without | ||
| * specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | ||
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | ||
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | ||
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | ||
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | ||
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| ******************************************************************************/ | ||
| package com.salesforce.hbase.index; | ||
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| import org.apache.hadoop.hbase.Abortable; | ||
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| /** | ||
| * {@link Abortable} that can rethrow the cause of the abort. | ||
| */ | ||
| public class CapturingAbortable implements Abortable { | ||
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| private Abortable delegate; | ||
| private Throwable cause; | ||
| private String why; | ||
|
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| public CapturingAbortable(Abortable delegate) { | ||
| this.delegate = delegate; | ||
| } | ||
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| @Override | ||
| public void abort(String why, Throwable e) { | ||
| if (delegate.isAborted()) { | ||
| return; | ||
| } | ||
| this.why = why; | ||
| this.cause = e; | ||
| delegate.abort(why, e); | ||
|
|
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| } | ||
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| @Override | ||
| public boolean isAborted() { | ||
| return delegate.isAborted(); | ||
| } | ||
|
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| /** | ||
| * Throw the cause of the abort, if <tt>this</tt> was aborted. If there was an exception causing | ||
| * the abort, re-throws that. Otherwise, just throws a generic {@link Exception} with the reason | ||
| * why the abort was caused. | ||
| * @throws Throwable the cause of the abort. | ||
| */ | ||
| public void throwCauseIfAborted() throws Throwable { | ||
| if (!this.isAborted()) { | ||
| return; | ||
| } | ||
| if (cause == null) { | ||
| throw new Exception(why); | ||
| } | ||
| throw cause; | ||
| } | ||
| } |
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