/*
 * Copyright 2013 Red Hat Inc. and/or its affiliates and other 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.switchyard.rhq.plugin;

import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.rhq.core.domain.measurement.AvailabilityType;
import org.rhq.core.domain.measurement.MeasurementDataNumeric;
import org.rhq.core.domain.measurement.MeasurementReport;
import org.rhq.core.domain.measurement.MeasurementScheduleRequest;
import org.rhq.core.pluginapi.measurement.MeasurementFacet;
import org.rhq.modules.plugins.jbossas7.json.Operation;
import org.switchyard.rhq.plugin.model.OperationMetrics;

/**
 * SwitchYard Reference Operation Resource Component
 */
public class ReferenceOperationResourceComponent extends BaseSwitchYardResourceComponent<ReferenceResourceComponent> implements MeasurementFacet {
    /**
     * The logger instance.
     */
    private static Log LOG = LogFactory.getLog(ReferenceOperationResourceComponent.class);
    
    protected Log getLog() {
        return LOG;
    }

    @Override
    public AvailabilityType getAvailability() {
        final OperationMetrics metrics = getOperationMetrics();
        return (metrics == null) ? AvailabilityType.DOWN : AvailabilityType.UP;
    }

    public OperationMetrics getOperationMetrics() {
        final String operationKey = getResourceContext().getResourceKey();
        return getResourceContext().getParentResourceComponent().getOperationMetrics().get(operationKey);
    }

    public <T> T execute(final Operation operation, Class<T> clazz) {
        return getResourceContext().getParentResourceComponent().execute(operation, clazz);
    }

    @Override
    public void getValues(final MeasurementReport report, final Set<MeasurementScheduleRequest> requests) throws Exception {
        final OperationMetrics metrics = getOperationMetrics();
        if (metrics != null) {
            for (MeasurementScheduleRequest request: requests) {
                final MeasurementDataNumeric measurementData = getCommonMetric(request, metrics);
                if (measurementData != null) {
                    report.addData(measurementData);
                } else if (LOG.isDebugEnabled()) {
                    LOG.debug("Unable to collect Reference Operation measurement " + request.getName());
                }
            }
        }
    }
}