/**
 * Copyright 2015-2017 Red Hat, Inc, and individual contributors.
 *
 * 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 org.wildfly.swarm.bootstrap.performance;

/**
 * @author Bob McWhirter
 */
class TimedEvent implements AutoCloseable {

    private final long start;

    private long stop = -1;

    TimedEvent() {
        this.start = System.currentTimeMillis();
    }

    boolean isOpen() {
        return this.stop < 0;
    }

    @Override
    public void close() throws Exception {
        this.stop = System.currentTimeMillis();
    }

    long durationMs() {
        if (this.stop < 0) {
            return System.currentTimeMillis() - this.start;
        }

        return this.stop - this.start;
    }
}
