jena-db/jena-dboe-transaction/src/main/java/org/apache/jena/dboe/transaction/txn/journal/JournalControl.java

/*
 * 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.jena.dboe.transaction.txn.journal;

import java.util.Iterator;

import org.apache.jena.dboe.base.file.BufferChannelFile;

public class JournalControl {
    /**
     * Dump a journal - debug support function - opens the journal specially -
     * inconsistent views possible
     */
    public static void print(String filename) {
        BufferChannelFile chan = BufferChannelFile.createUnmanaged(filename, "r");
        Journal journal = Journal.create(chan);
        try {
            print(journal);
        }
        finally {
            journal.close();
        }
    }

    /**
     * Dump a journal - debug support function.
     */
    public static void print(Journal journal) {
        System.out.println("Size: " + journal.size());
        Iterator<JournalEntry> iter = journal.entries();

        for (; iter.hasNext() ; ) {
            JournalEntry e = iter.next();
            // System.out.println("Posn: "+journal.position()+" :
            // ("+(journal.size()-journal.position())+")");
            System.out.println(JournalEntry.format(e));
        }
    }
}