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Add translog checksums #7232
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Add translog checksums #7232
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74 changes: 74 additions & 0 deletions
74
src/main/java/org/elasticsearch/index/translog/BufferedChecksumStreamInput.java
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,74 @@ | ||
/* | ||
* Licensed to Elasticsearch under one or more contributor | ||
* license agreements. See the NOTICE file distributed with | ||
* this work for additional information regarding copyright | ||
* ownership. Elasticsearch 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 org.elasticsearch.index.translog; | ||
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import org.apache.lucene.store.BufferedChecksum; | ||
import org.elasticsearch.common.io.stream.StreamInput; | ||
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import java.io.IOException; | ||
import java.util.zip.CRC32; | ||
import java.util.zip.Checksum; | ||
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/** | ||
* Similar to Lucene's BufferedChecksumIndexInput, however this wraps a | ||
* {@link StreamInput} so anything read will update the checksum | ||
*/ | ||
public final class BufferedChecksumStreamInput extends StreamInput { | ||
private final StreamInput in; | ||
private final Checksum digest; | ||
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public BufferedChecksumStreamInput(StreamInput in) { | ||
this.in = in; | ||
this.digest = new BufferedChecksum(new CRC32()); | ||
} | ||
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public long getChecksum() { | ||
return this.digest.getValue(); | ||
} | ||
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@Override | ||
public byte readByte() throws IOException { | ||
final byte b = in.readByte(); | ||
digest.update(b); | ||
return b; | ||
} | ||
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@Override | ||
public void readBytes(byte[] b, int offset, int len) throws IOException { | ||
in.readBytes(b, offset, len); | ||
digest.update(b, offset, len); | ||
} | ||
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@Override | ||
public void reset() throws IOException { | ||
in.reset(); | ||
digest.reset(); | ||
} | ||
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@Override | ||
public int read() throws IOException { | ||
return readByte() & 0xFF; | ||
} | ||
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@Override | ||
public void close() throws IOException { | ||
in.close(); | ||
} | ||
} |
73 changes: 73 additions & 0 deletions
73
src/main/java/org/elasticsearch/index/translog/BufferedChecksumStreamOutput.java
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,73 @@ | ||
/* | ||
* Licensed to Elasticsearch under one or more contributor | ||
* license agreements. See the NOTICE file distributed with | ||
* this work for additional information regarding copyright | ||
* ownership. Elasticsearch 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 org.elasticsearch.index.translog; | ||
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import org.apache.lucene.store.BufferedChecksum; | ||
import org.elasticsearch.common.io.stream.StreamOutput; | ||
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import java.io.IOException; | ||
import java.util.zip.CRC32; | ||
import java.util.zip.Checksum; | ||
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/** | ||
* Similar to Lucene's BufferedChecksumIndexOutput, however this wraps a | ||
* {@link StreamOutput} so anything written will update the checksum | ||
*/ | ||
public final class BufferedChecksumStreamOutput extends StreamOutput { | ||
private final StreamOutput out; | ||
private final Checksum digest; | ||
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public BufferedChecksumStreamOutput(StreamOutput out) { | ||
this.out = out; | ||
this.digest = new BufferedChecksum(new CRC32()); | ||
} | ||
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public long getChecksum() { | ||
return this.digest.getValue(); | ||
} | ||
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@Override | ||
public void writeByte(byte b) throws IOException { | ||
out.writeByte(b); | ||
digest.update(b); | ||
} | ||
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@Override | ||
public void writeBytes(byte[] b, int offset, int length) throws IOException { | ||
out.writeBytes(b, offset, length); | ||
digest.update(b, offset, length); | ||
} | ||
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@Override | ||
public void flush() throws IOException { | ||
out.flush(); | ||
} | ||
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@Override | ||
public void close() throws IOException { | ||
out.close(); | ||
} | ||
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@Override | ||
public void reset() throws IOException { | ||
out.reset(); | ||
digest.reset(); | ||
} | ||
} |
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What is the contract of this method? Usually (e.g. java InputStream) its that it returns an integer value between 0 and 255. So I think this is missing & 0xFF ?
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Okay, added this, thanks!