com.bstek.dorado.console.system.log.console.SystemOutMonitor.java Source code

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Here is the source code for com.bstek.dorado.console.system.log.console.SystemOutMonitor.java

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/*
 * This file is part of Dorado 7.x (http://dorado7.bsdn.org).
 * 
 * Copyright (c) 2002-2012 BSTEK Corp. All rights reserved.
 * 
 * This file is dual-licensed under the AGPLv3 (http://www.gnu.org/licenses/agpl-3.0.html) 
 * and BSDN commercial (http://www.bsdn.org/licenses) licenses.
 * 
 * If you are unsure which license is appropriate for your use, please contact the sales department
 * at http://www.bstek.com/contact.
 */

package com.bstek.dorado.console.system.log.console;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.StringUtils;

import com.bstek.dorado.annotation.Expose;
import com.bstek.dorado.console.Setting;
import com.bstek.dorado.console.system.log.ExpirableLogBuffer;
import com.bstek.dorado.console.system.log.ExpirablePublisher;
import com.bstek.dorado.console.system.log.LogLine;
import com.bstek.dorado.view.View;
import com.bstek.dorado.web.DoradoContext;

/**
 * System.out
 * 
 * @author Alex tong (mailto:alex.tong@bstek.com)
 * @since 2012-11-22
 */
public class SystemOutMonitor {

    private String listenerIdKey = "CONSOLE_LISTENER_ID_KEY";

    public void onViewInit(View view) {
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("listenerActiveState", Setting.getListenerActiveState());
        view.setUserData(map);
    }

    @Expose
    public List<LogLine> last() {

        DoradoContext ctx = DoradoContext.getCurrent();
        String listenerId = (String) ctx.getAttribute(DoradoContext.VIEW, listenerIdKey);

        SystemOutTailWork sysLog = SystemOutTailWork.getInstance();
        synchronized (sysLog) {
            if (!sysLog.isOnWork()) {
                sysLog.startWork();
            }
        }

        ExpirablePublisher publisher = sysLog.getPublisher();

        ExpirableLogBuffer logBuffer = null;
        if (StringUtils.isNotEmpty(listenerId)) {
            logBuffer = publisher.find(listenerId);
        }

        if (logBuffer == null) {
            logBuffer = publisher.create();
            publisher.register(logBuffer);
        }

        if (StringUtils.isEmpty(listenerId)) {
            listenerId = publisher.listenerId(logBuffer);
            ctx.setAttribute(DoradoContext.VIEW, listenerIdKey, listenerId);
        }

        return logBuffer.getLastLines();
    }

}