svn commit: r1477977 - /jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/FileStore.java

[ju...@apache.org]

Author: jukka
Date: Wed May  1 12:53:21 2013
New Revision: 1477977

URL: http://svn.apache.org/r1477977
Log:
OAK-788: File backend for the SegmentMK

Include the FileStore class missing from previous commit

Added:
    jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/FileStore.java   (with props)

Added: jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/FileStore.java
URL: http://svn.apache.org/viewvc/jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/FileStore.java?rev=1477977&view=auto
==============================================================================
--- jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/FileStore.java (added)
+++ jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/FileStore.java Wed May  1 12:53:21 2013
@@ -0,0 +1,127 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF 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.
+ */
+package org.apache.jackrabbit.oak.plugins.segment;
+
+import static com.google.common.base.Charsets.UTF_8;
+import static java.nio.channels.FileChannel.MapMode.READ_WRITE;
+import static org.apache.jackrabbit.oak.plugins.memory.EmptyNodeState.EMPTY_NODE;
+
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.util.Collection;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentMap;
+
+import org.apache.jackrabbit.oak.spi.state.NodeState;
+
+import com.google.common.collect.Maps;
+
+public class FileStore implements SegmentStore {
+
+    private final Map<String, Journal> journals = Maps.newHashMap();
+
+    private final ByteBuffer tar;
+
+    private final ConcurrentMap<UUID, Segment> segments =
+            Maps.newConcurrentMap();
+
+    public FileStore(String filename, NodeState root) {
+        try {
+            RandomAccessFile file = new RandomAccessFile(filename, "rw");
+            try {
+                tar = file.getChannel().map(READ_WRITE, 0, 1024 * 1024 * 1024);
+            } finally {
+                file.close();
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        journals.put("root", new MemoryJournal(this, root));
+    }
+
+    public FileStore(NodeState root) {
+        this("data.tar", root);
+    }
+
+    public FileStore(String filename) {
+        this(filename, EMPTY_NODE);
+    }
+
+    public FileStore() {
+        this(EMPTY_NODE);
+    }
+
+    @Override
+    public synchronized Journal getJournal(final String name) {
+        Journal journal = journals.get(name);
+        if (journal == null) {
+            journal = new MemoryJournal(this, "root");
+            journals.put(name, journal);
+        }
+        return journal;
+    }
+
+    @Override
+    public Segment readSegment(UUID id) {
+        Segment segment = segments.get(id);
+        if (segment != null) {
+            return segment;
+        } else {
+            throw new IllegalArgumentException("Segment not found: " + id);
+        }
+    }
+
+    @Override
+    public void createSegment(
+            UUID segmentId, byte[] data, int offset, int length,
+            Collection<UUID> referencedSegmentIds,
+            Map<String, RecordId> strings, Map<Template, RecordId> templates) {
+        tar.put(segmentId.toString().getBytes(UTF_8));
+        tar.putInt(referencedSegmentIds.size());
+        for (UUID referencedSegmentId : referencedSegmentIds) {
+            tar.putLong(referencedSegmentId.getMostSignificantBits());
+            tar.putLong(referencedSegmentId.getLeastSignificantBits());
+        }
+        tar.putInt(length);
+        int position = tar.position();
+        tar.put(data, offset, length);
+
+        ByteBuffer buffer = tar.asReadOnlyBuffer();
+        buffer.position(position);
+        buffer.limit(position + length);
+        buffer = buffer.slice();
+
+        Segment segment = new Segment(
+                this, segmentId, buffer,
+                referencedSegmentIds, strings, templates);
+        if (segments.putIfAbsent(segmentId, segment) != null) {
+            throw new IllegalStateException(
+                    "Segment override: " + segmentId);
+        }
+    }
+
+    @Override
+    public void deleteSegment(UUID segmentId) {
+        if (segments.remove(segmentId) == null) {
+            throw new IllegalStateException("Missing segment: " + segmentId);
+        }
+    }
+
+}

Propchange: jackrabbit/oak/trunk/oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/segment/FileStore.java
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