/*
* 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.mongomk.impl.command;
import java.util.ArrayList;
import java.util.List;
import org.apache.jackrabbit.mk.api.MicroKernelException;
import org.apache.jackrabbit.mk.json.JsopBuilder;
import org.apache.jackrabbit.mk.model.tree.DiffBuilder;
import org.apache.jackrabbit.mongomk.api.model.Node;
import org.apache.jackrabbit.mongomk.impl.MongoNodeStore;
import org.apache.jackrabbit.mongomk.impl.action.FetchCommitsAction;
import org.apache.jackrabbit.mongomk.impl.model.MongoCommit;
import org.apache.jackrabbit.mongomk.impl.model.tree.SimpleMongoNodeStore;
import org.apache.jackrabbit.mongomk.util.MongoUtil;
/**
* A {@code Command} for {@code MongoMicroKernel#getRevisionHistory(long, int, String)}
*/
public class GetRevisionHistoryCommand extends BaseCommand<String> {
private final long since;
private int maxEntries;
private String path;
/**
* Constructs a {@code GetRevisionHistoryCommandMongo}
*
* @param nodeStore Node store.
* @param since Timestamp (ms) of earliest revision to be returned
* @param maxEntries maximum #entries to be returned; if < 0, no limit will be applied.
* @param path optional path filter; if {@code null} or {@code ""} the
* default ({@code "/"}) will be assumed, i.e. no filter will be applied
*/
public GetRevisionHistoryCommand(MongoNodeStore nodeStore,
long since, int maxEntries, String path) {
super(nodeStore);
this.since = since;
this.maxEntries = maxEntries;
this.path = path;
}
@Override
public String execute() {
path = MongoUtil.adjustPath(path);
maxEntries = maxEntries < 0 ? Integer.MAX_VALUE : maxEntries;
FetchCommitsAction action = new FetchCommitsAction(nodeStore);
action.setMaxEntries(maxEntries);
action.includeBranchCommits(false);
List<MongoCommit> commits = action.execute();
List<MongoCommit> history = new ArrayList<MongoCommit>();
for (int i = commits.size() - 1; i >= 0; i--) {
MongoCommit commit = commits.get(i);
if (commit.getTimestamp() >= since) {
if (MongoUtil.isFiltered(path)) {
try {
String diff = new DiffBuilder(
MongoUtil.wrap(getNode("/", commit.getBaseRevisionId())),
MongoUtil.wrap(getNode("/", commit.getRevisionId())),
"/", -1, new SimpleMongoNodeStore(), path).build();
if (!diff.isEmpty()) {
history.add(commit);
}
} catch (Exception e) {
throw new MicroKernelException(e);
}
} else {
history.add(commit);
}
}
}
JsopBuilder buff = new JsopBuilder().array();
for (MongoCommit commit : history) {
buff.object()
.key("id").value(MongoUtil.fromMongoRepresentation(commit.getRevisionId()))
.key("ts").value(commit.getTimestamp())
.key("msg").value(commit.getMessage())
.endObject();
}
return buff.endArray().toString();
}
private Node getNode(String path, long revisionId) throws Exception {
return new GetNodesCommandNew(nodeStore, path, revisionId).execute();
}
}