MemoryWALUpdates.java

/*
 * Copyright 2013 Jive Software, Inc
 *
 * Licensed 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 com.jivesoftware.os.amza.api.wal;

import com.jivesoftware.os.amza.api.stream.Commitable;
import com.jivesoftware.os.amza.api.stream.UnprefixedTxKeyValueStream;
import com.jivesoftware.os.amza.api.take.Highwaters;
import java.util.List;

public class MemoryWALUpdates implements Commitable {

    private final List<WALRow> updates;
    private final WALHighwater walHighwater;

    public MemoryWALUpdates(List<WALRow> updates, WALHighwater walHighwater) {
        this.updates = updates;
        this.walHighwater = walHighwater;
    }

    @Override
    public boolean commitable(Highwaters highwaters, UnprefixedTxKeyValueStream txKeyValueStream) throws Exception {
        for (WALRow update : updates) {
            if (!txKeyValueStream.row(-1, update.key, update.value, update.timestamp, update.tombstoned, update.version)) {
                return false;
            }
        }
        if (highwaters != null && walHighwater != null) {
            highwaters.highwater(walHighwater);
        }
        return true;
    }
}