/*
* Copyright (C) 2011, Google Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* 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 the Eclipse Foundation, Inc. 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
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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package org.eclipse.jgit.storage.dht.spi.memory;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.eclipse.jgit.generated.storage.dht.proto.GitStore.ChunkMeta;
import org.eclipse.jgit.storage.dht.AsyncCallback;
import org.eclipse.jgit.storage.dht.ChunkKey;
import org.eclipse.jgit.storage.dht.DhtException;
import org.eclipse.jgit.storage.dht.DhtText;
import org.eclipse.jgit.storage.dht.PackChunk;
import org.eclipse.jgit.storage.dht.spi.ChunkTable;
import org.eclipse.jgit.storage.dht.spi.Context;
import org.eclipse.jgit.storage.dht.spi.WriteBuffer;
import org.eclipse.jgit.storage.dht.spi.util.ColumnMatcher;
import com.google.protobuf.InvalidProtocolBufferException;
final class MemChunkTable implements ChunkTable {
private final MemTable table = new MemTable();
private final ColumnMatcher colData = new ColumnMatcher("data");
private final ColumnMatcher colIndex = new ColumnMatcher("index");
private final ColumnMatcher colMeta = new ColumnMatcher("meta");
public void get(Context options, Set<ChunkKey> keys,
AsyncCallback<Collection<PackChunk.Members>> callback) {
int cnt = keys.size();
List<PackChunk.Members> out = new ArrayList<PackChunk.Members>(cnt);
for (ChunkKey chunk : keys) {
byte[] row = chunk.asBytes();
MemTable.Cell cell;
cell = table.get(row, colData.name());
if (cell == null)
continue;
PackChunk.Members m = new PackChunk.Members();
m.setChunkKey(chunk);
m.setChunkData(cell.getValue());
cell = table.get(row, colIndex.name());
if (cell != null)
m.setChunkIndex(cell.getValue());
cell = table.get(row, colMeta.name());
if (cell != null) {
try {
m.setMeta(ChunkMeta.parseFrom(cell.getValue()));
} catch (InvalidProtocolBufferException err) {
callback.onFailure(new DhtException(MessageFormat.format(
DhtText.get().invalidChunkMeta, chunk), err));
return;
}
}
out.add(m);
}
callback.onSuccess(out);
}
public void getMeta(Context options, Set<ChunkKey> keys,
AsyncCallback<Map<ChunkKey, ChunkMeta>> callback) {
Map<ChunkKey, ChunkMeta> out = new HashMap<ChunkKey, ChunkMeta>();
for (ChunkKey chunk : keys) {
byte[] row = chunk.asBytes();
MemTable.Cell cell = table.get(row, colMeta.name());
if (cell != null) {
try {
out.put(chunk, ChunkMeta.parseFrom(cell.getValue()));
} catch (InvalidProtocolBufferException err) {
callback.onFailure(new DhtException(MessageFormat.format(
DhtText.get().invalidChunkMeta, chunk), err));
return;
}
}
}
callback.onSuccess(out);
}
public void put(PackChunk.Members chunk, WriteBuffer buffer)
throws DhtException {
byte[] row = chunk.getChunkKey().asBytes();
if (chunk.hasChunkData())
table.put(row, colData.name(), chunk.getChunkData());
if (chunk.hasChunkIndex())
table.put(row, colIndex.name(), chunk.getChunkIndex());
if (chunk.hasMeta())
table.put(row, colMeta.name(), chunk.getMeta().toByteArray());
}
public void remove(ChunkKey key, WriteBuffer buffer) throws DhtException {
table.deleteRow(key.asBytes());
}
}