/*
* 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.
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* - 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
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package org.eclipse.jgit.storage.cassandra;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.TimeoutException;
import me.prettyprint.cassandra.serializers.BytesArraySerializer;
import me.prettyprint.hector.api.beans.ColumnSlice;
import me.prettyprint.hector.api.beans.HColumn;
import me.prettyprint.hector.api.factory.HFactory;
import org.eclipse.jgit.storage.dht.CachedPackInfo;
import org.eclipse.jgit.storage.dht.CachedPackKey;
import org.eclipse.jgit.storage.dht.ChunkInfo;
import org.eclipse.jgit.storage.dht.ChunkKey;
import org.eclipse.jgit.storage.dht.DhtException;
import org.eclipse.jgit.storage.dht.RepositoryKey;
import org.eclipse.jgit.storage.dht.spi.Context;
import org.eclipse.jgit.storage.dht.spi.RepositoryTable;
import org.eclipse.jgit.storage.dht.spi.WriteBuffer;
import org.eclipse.jgit.storage.dht.spi.util.ColumnMatcher;
class CsRepositoryTable implements RepositoryTable {
private static final BytesArraySerializer S = CassandraDatabase.S;
private static final String CF = "Repository";
private final CassandraDatabase db;
private final ColumnMatcher colChunkInfo;
private final ColumnMatcher colCachedPack;
CsRepositoryTable(CassandraDatabase db) {
this.db = db;
this.colChunkInfo = new ColumnMatcher("chunkInfo:");
this.colCachedPack = new ColumnMatcher("cachedPack:");
}
public RepositoryKey nextKey() throws DhtException {
// TODO(spearce) Use a unique assignment.
long now = System.currentTimeMillis() / 1000L;
now -= 1297547467L; // Feb 12 2011
return RepositoryKey.create((int) now);
}
public Collection<CachedPackInfo> getCachedPacks(RepositoryKey repo)
throws DhtException, TimeoutException {
ColumnSlice<byte[], byte[]> slice = HFactory
.createSliceQuery(db.getKeyspace(Context.LOCAL), S, S, S)
.setColumnFamily(CF)
.setKey(repo.asBytes())
.setRange(colCachedPack.append(new byte[] {}),
colCachedPack.append(new byte[] { '~' }), false,
Integer.MAX_VALUE).execute().get();
if (slice == null || slice.getColumns().isEmpty())
return Collections.emptyList();
int estCnt = slice.getColumns().size();
List<CachedPackInfo> info = new ArrayList<CachedPackInfo>(estCnt);
for (HColumn<byte[], byte[]> col : slice.getColumns()) {
byte[] name = col.getName();
if (colCachedPack.sameFamily(name))
info.add(CachedPackInfo.fromBytes(col.getValue()));
}
return info;
}
public void put(RepositoryKey repo, CachedPackInfo info, WriteBuffer buffer)
throws DhtException {
CsBuffer buf = (CsBuffer) buffer;
buf.put(CF, //
repo.asBytes(), //
colCachedPack.append(info.getRowKey()), //
info.asBytes());
}
public void remove(RepositoryKey repo, CachedPackKey key, WriteBuffer buffer)
throws DhtException {
CsBuffer buf = (CsBuffer) buffer;
buf.delete(CF, repo.asBytes(), colCachedPack.append(key.asBytes()));
}
public void put(RepositoryKey repo, ChunkInfo info, WriteBuffer buffer)
throws DhtException {
CsBuffer buf = (CsBuffer) buffer;
ChunkKey key = info.getChunkKey();
buf.put(CF, //
repo.asBytes(), //
colChunkInfo.append(key.asBytes()), //
info.asBytes());
}
public void remove(RepositoryKey repo, ChunkKey chunk, WriteBuffer buffer)
throws DhtException {
CsBuffer buf = (CsBuffer) buffer;
buf.delete(CF, repo.asBytes(), colChunkInfo.append(chunk.asBytes()));
}
}