/*
 * Copyright 2014 Open Networking Laboratory
 *
 * 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.onlab.onos.metrics.intent;

import java.util.List;
import org.onlab.metrics.EventMetric;
import org.onlab.onos.net.intent.IntentEvent;

/**
 * Service interface exported by IntentMetrics.
 */
public interface IntentMetricsService {
    /**
     * Gets the last saved intent events.
     *
     * @return the last saved intent events.
     */
    public List<IntentEvent> getEvents();

    /**
     * Gets the Event Metric for the intent SUBMITTED events.
     *
     * @return the Event Metric for the intent SUBMITTED events.
     */
    public EventMetric intentSubmittedEventMetric();

    /**
     * Gets the Event Metric for the intent INSTALLED events.
     *
     * @return the Event Metric for the intent INSTALLED events.
     */
    public EventMetric intentInstalledEventMetric();

    /**
     * Gets the Event Metric for the intent WITHDRAW_REQUESTED events.
     *
     * TODO: This intent event is not implemented yet.
     *
     * @return the Event Metric for the intent WITHDRAW_REQUESTED events.
     */
    public EventMetric intentWithdrawRequestedEventMetric();

    /**
     * Gets the Event Metric for the intent WITHDRAWN events.
     *
     * @return the Event Metric for the intent WITHDRAWN events.
     */
    public EventMetric intentWithdrawnEventMetric();
}