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HDFS-9091. Erasure Coding: Provide DistributedFilesystem API to getAllErasureCodingPolicies. Contributed by Rakesh R.

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Change-Id: Id30a1ce9e2ce676d00a9220a2d3f14b8d9f00527
This commit is contained in:
Zhe Zhang 2015-09-21 13:24:02 -07:00
parent b762199adb
commit a9e6681edf
3 changed files with 29 additions and 0 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-EC-7285.txt
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@ -441,3 +441,6 @@
HDFS-9113. ErasureCodingWorker#processErasureCodingTasks should not fail to process HDFS-9113. ErasureCodingWorker#processErasureCodingTasks should not fail to process
remaining tasks due to one invalid ECTask (umamahesh) remaining tasks due to one invalid ECTask (umamahesh)
HDFS-9091. Erasure Coding: Provide DistributedFilesystem API to
getAllErasureCodingPolicies. (Rakesh R via zhz)

11
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java
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@ -2324,4 +2324,15 @@ public ErasureCodingPolicy next(final FileSystem fs, final Path p)
} }
}.resolve(this, absF); }.resolve(this, absF);
} }
/**
* Retrieve all the erasure coding policies supported by this file system.
*
* @return all erasure coding policies supported by this file system.
* @throws IOException
*/
public Collection<ErasureCodingPolicy> getAllErasureCodingPolicies()
throws IOException {
return Arrays.asList(dfs.getErasureCodingPolicies());
}
} }

15
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestErasureCodingPolicies.java
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@ -32,6 +32,7 @@
import org.junit.Test; import org.junit.Test;
import java.io.IOException; import java.io.IOException;
import java.util.Collection;
import static org.apache.hadoop.test.GenericTestUtils.assertExceptionContains; import static org.apache.hadoop.test.GenericTestUtils.assertExceptionContains;
import static org.junit.Assert.*; import static org.junit.Assert.*;
@ -231,4 +232,18 @@ public void testCreationErasureCodingZoneWithInvalidPolicy()
} }
} }
@Test
public void testGetAllErasureCodingPolicies() throws Exception {
ErasureCodingPolicy[] sysECPolicies = ErasureCodingPolicyManager
.getSystemPolices();
assertTrue("System ecPolicies should be of only 1 for now",
sysECPolicies.length == 1);
Collection<ErasureCodingPolicy> allECPolicies = fs
.getAllErasureCodingPolicies();
assertTrue("All ecPolicies should be of only 1 for now",
allECPolicies.size() == 1);
assertEquals("Erasure coding policy mismatches",
sysECPolicies[0], allECPolicies.iterator().next());
}
} }