/*
 * Copyright 2011 Alibaba Group.
 *
 * 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 com.alibaba.druid.stat;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.alibaba.druid.filter.trace.TraceEvent;
import com.alibaba.druid.filter.trace.TraceEventListener;

public class JdbcTraceManager implements JdbcTraceManagerMBean {

    public final static Log                LOG            = LogFactory.getLog(JdbcTraceManager.class);

    private boolean                        traceEnable    = false;

    private final static JdbcTraceManager  instance       = new JdbcTraceManager();

    private final List<TraceEventListener> eventListeners = new ArrayList<TraceEventListener>();

    private final AtomicLong               fireEventCount = new AtomicLong();
    private final AtomicLong               skipEventCount = new AtomicLong();

    public static JdbcTraceManager getInstance() {
        return instance;
    }

    public boolean isTraceEnable() {
        return traceEnable;
    }

    public void setTraceEnable(boolean traceEnable) {
        this.traceEnable = traceEnable;
    }

    public long getEventFiredCount() {
        return fireEventCount.get();
    }

    public int getEventListenerSize() {
        return this.eventListeners.size();
    }

    public long getEventSkipCount() {
        return skipEventCount.get();
    }

    public void fireTraceEvent(TraceEvent event) {
        fireEventCount.incrementAndGet();

        if (!this.traceEnable) {
            skipEventCount.incrementAndGet();
            return;
        }

        for (TraceEventListener listener : this.eventListeners) {
            try {
                listener.fireEvent(event);
            } catch (Exception e) {
                LOG.error("fireTraceEventError", e);
            }
        }
    }

    public List<TraceEventListener> getEventListeners() {
        return eventListeners;
    }
}