/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.apache.synapse.aspects;

import org.apache.synapse.MessageContext;
import org.apache.synapse.SynapseConstants;
import org.apache.synapse.config.xml.XMLConfigConstants;

/**
 * Take an  AspectConfiguration based on some strategy - Currently only consider statistics
 */
public class AspectConfigurationDetectionStrategy {

    private static Boolean statisticsEnable, tracingEnabled;

    /**
     * Factory method to create the AspectConfiguration when there is no a defined main sequence and
     * only there is a set of mediators. This is useful when collecting stats for messages going
     * through the main sequence
     * //TODO cache
     *
     * @param synCtx Message Context
     * @return an AspectConfiguration instance
     */
    public static AspectConfiguration getAspectConfiguration(MessageContext synCtx) {

        if (statisticsEnable == null) {
            if (XMLConfigConstants.STATISTICS_ENABLE.equals(
                    synCtx.getConfiguration().getProperty(
                            SynapseConstants.SYNAPSE_STATISTICS_STATE))) {
                statisticsEnable = true;
            } else {
                statisticsEnable = false;
            }
        }

        if (tracingEnabled == null) {
            if (XMLConfigConstants.TRACE_ENABLE.equals(
                    synCtx.getConfiguration().getProperty(
                            SynapseConstants.SYNAPSE_TRACE_STATE))) {
                tracingEnabled = true;
            } else {
                tracingEnabled = false;
            }
        }

        AspectConfiguration configuration = new AspectConfiguration(
                SynapseConstants.SYNAPSE_ASPECTS);
        if (statisticsEnable) {
            configuration.enableStatistics();
        }
        if (tracingEnabled) {
            configuration.enableTracing();
        }

        if (statisticsEnable || tracingEnabled) {
            return configuration;
        }

        return null;
    }
}