co.cask.cdap.logging.gateway.handlers.FormattedLogEvent.java Source code

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Here is the source code for co.cask.cdap.logging.gateway.handlers.FormattedLogEvent.java

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/*
 * Copyright  2015 Cask Data, 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 co.cask.cdap.logging.gateway.handlers;

import co.cask.cdap.logging.read.LogOffset;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.base.Splitter;
import com.google.common.collect.Iterables;

/**
* Handles formatting of log event to send
*/
public final class FormattedLogEvent {
    private static final char SEPARATOR = '.';

    @SuppressWarnings({ "FieldCanBeLocal", "UnusedDeclaration" })
    private final String log;
    @SuppressWarnings({ "FieldCanBeLocal", "UnusedDeclaration" })
    private final String offset;

    public FormattedLogEvent(String log, LogOffset offset) {
        this.log = log;
        this.offset = formatLogOffset(offset);
    }

    public static String formatLogOffset(LogOffset logOffset) {
        return Joiner.on(SEPARATOR).join(logOffset.getKafkaOffset(), logOffset.getTime());
    }

    public static LogOffset parseLogOffset(String offsetStr) {
        if (offsetStr.isEmpty()) {
            return LogOffset.LATEST_OFFSET;
        }

        Iterable<String> splits = Splitter.on(SEPARATOR).split(offsetStr);
        Preconditions.checkArgument(Iterables.size(splits) == 2, "Invalid offset provided: %s", offsetStr);

        return new LogOffset(Long.valueOf(Iterables.get(splits, 0)), Long.valueOf(Iterables.get(splits, 1)));
    }
}