rtcpostsubscriber.java

来自「opennms得相关源码 请大家看看」· Java 代码 · 共 251 行

//
// This file is part of the OpenNMS(R) Application.
//
// OpenNMS(R) is Copyright (C) 2002-2003 The OpenNMS Group, Inc.  All rights reserved.
// OpenNMS(R) is a derivative work, containing both original code, included code and modified
// code that was published under the GNU General Public License. Copyrights for modified 
// and included code are below.
//
// OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
//
// Copyright (C) 1999-2001 Oculan Corp.  All rights reserved.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// For more information contact:
//      OpenNMS Licensing       <[e-mail]>
//      http://www.opennms.org/
//      http://www.opennms.com/
//

package org.opennms.web.category;

import java.io.IOException;
import java.lang.reflect.UndeclaredThrowableException;
import java.net.InetAddress;
import java.net.UnknownHostException;

import org.apache.log4j.Category;
import org.exolab.castor.xml.MarshalException;
import org.exolab.castor.xml.ValidationException;
import org.opennms.core.resource.Vault;
import org.opennms.core.utils.ThreadCategory;
import org.opennms.netmgt.EventConstants;
import org.opennms.netmgt.config.ViewsDisplayFactory;
import org.opennms.netmgt.config.viewsdisplay.Section;
import org.opennms.netmgt.config.viewsdisplay.View;
import org.opennms.netmgt.utils.EventProxy;
import org.opennms.netmgt.utils.EventProxyException;
import org.opennms.netmgt.utils.TcpEventProxy;
import org.opennms.netmgt.xml.event.Event;
import org.opennms.netmgt.xml.event.Parm;
import org.opennms.netmgt.xml.event.Parms;
import org.opennms.netmgt.xml.event.Value;
import org.opennms.web.Util;

/**
 * @author <A HREF="[e-mail]">Larry Karnowski </A>
 * @author <A HREF="http://www.opennms.org/">OpenNMS </A>
 */
public class RTCPostSubscriber extends Object {
    protected EventProxy m_proxy;

    protected String m_url;

    protected String m_username;

    protected String m_password;

    protected static Category s_log = ThreadCategory.getInstance("RTC");

    public RTCPostSubscriber() throws IOException, MarshalException, ValidationException {
        m_proxy = createEventProxy();
    }

    private EventProxy createEventProxy() {
        /*
         * Rather than defaulting to localhost all the time, give an option in web.xml
         */
        String proxyHostName = Vault.getProperty("opennms.rtc.event.proxy.host") == null ? "localhost" : Vault.getProperty("opennms.rtc.event.proxy.host");
        String proxyHostPort = Vault.getProperty("opennms.rtc.event.proxy.port") == null ? "5817" : Vault.getProperty("opennms.rtc.event.proxy.port");
        InetAddress proxyAddr = null;
        EventProxy proxy = null;
        
        try {
            proxyAddr = InetAddress.getByName(proxyHostName);
        } catch (UnknownHostException e) {
            proxyAddr = null;
        }

        if (proxyAddr == null) {
            proxy = new TcpEventProxy();
        } else {
            proxy = new TcpEventProxy(proxyAddr, Integer.parseInt(proxyHostPort));
        }
        
        return proxy;

    }

    public static void sendSubscribeEvent(EventProxy proxy, String url, String username, String password, String categoryName) throws IllegalArgumentException, EventProxyException {
        if (proxy == null || url == null || username == null || password == null || categoryName == null) {
            throw new IllegalArgumentException("Cannot take null parameters.");
        }

        Event event = new Event();
        event.setSource("RTCPostSubscriber");
        event.setUei(EventConstants.RTC_SUBSCRIBE_EVENT_UEI);
        event.setHost("host");
        event.setTime(EventConstants.formatToString(new java.util.Date()));

        Parms parms = new Parms();

        // URL
        Value value = new Value();
        value.setContent(url);
        Parm parm = new Parm();
        parm.setParmName(EventConstants.PARM_URL);
        parm.setValue(value);
        parms.addParm(parm);

        // User
        value = new Value();
        value.setContent(username);
        parm = new Parm();
        parm.setParmName(EventConstants.PARM_USER);
        parm.setValue(value);
        parms.addParm(parm);

        // Password
        value = new Value();
        value.setContent(password);
        parm = new Parm();
        parm.setParmName(EventConstants.PARM_PASSWD);
        parm.setValue(value);
        parms.addParm(parm);

        // category
        value = new Value();
        value.setContent(categoryName);
        parm = new Parm();
        parm.setParmName(EventConstants.PARM_CAT_LABEL);
        parm.setValue(value);
        parms.addParm(parm);

        event.setParms(parms);

        proxy.send(event);

        s_log.info("Subscription requested for " + username + " to " + url);
    }

    public static void sendUnsubscribeEvent(EventProxy proxy, String url) throws IllegalArgumentException, EventProxyException {
        if (proxy == null || url == null) {
            throw new IllegalArgumentException("Cannot take null parameters.");
        }

        Event event = new Event();
        event.setSource("RTCPostSubscriber");
        event.setUei(EventConstants.RTC_UNSUBSCRIBE_EVENT_UEI);
        event.setHost("host");
        event.setTime(EventConstants.formatToString(new java.util.Date()));

        // URL
        Parms parms = new Parms();
        Value value = new Value();
        value.setContent(url);
        Parm parm = new Parm();
        parm.setParmName(EventConstants.PARM_URL);
        parm.setValue(value);
        parms.addParm(parm);

        event.setParms(parms);

        proxy.send(event);

        s_log.info("Unsubscription sent for " + url);
    }

    public String subscribe(String categoryName) throws IllegalArgumentException, EventProxyException {
        if (categoryName == null) {
            throw new IllegalArgumentException("Cannot take null parameters.");
        }

        initFromRtcPropertyFile(categoryName);

        sendSubscribeEvent(m_proxy, m_url, m_username, m_password, categoryName);
        return (m_url);
    }

    public void unsubscribe() throws IllegalArgumentException, EventProxyException {
        sendUnsubscribeEvent(m_proxy, m_url);
    }

    public void close() {
        m_proxy = null;
    }

    protected void initFromRtcPropertyFile(String categoryName) {
        if (categoryName == null) {
            throw new IllegalArgumentException("Cannot take null parameters.");
        }

        m_username = Vault.getProperty("opennms.rtc-client.http-post.username");
        m_password = Vault.getProperty("opennms.rtc-client.http-post.password");
        String baseUrl = Vault.getProperty("opennms.rtc-client.http-post.base-url");

        if (baseUrl.endsWith("/")) {
            m_url = baseUrl + Util.encode(categoryName);
        } else {
            m_url = baseUrl + "/" + Util.encode(categoryName);
        }

        s_log.debug("RTCPostSubscriber initialized: url=" + m_url + ", user=" + m_username);
    }

    public static void subscribeAll(String viewName) throws IOException, MarshalException, ValidationException, EventProxyException {
        if (viewName == null) {
            throw new IllegalArgumentException("Cannot take null parameters.");
        }

        // get the list of categories from the viewsdisplay.xml
        ViewsDisplayFactory.init();
        ViewsDisplayFactory factory = ViewsDisplayFactory.getInstance();

        View view = factory.getView(viewName);

        if (view != null) {
            Section[] sections = view.getSection();

            // create a JMS connection to subscribe
            RTCPostSubscriber subscriber = new RTCPostSubscriber();

            for (int i = 0; i < sections.length; i++) {
                Section section = sections[i];
                String[] categories = section.getCategory();

                for (int j = 0; j < categories.length; j++) {
                    subscriber.subscribe(categories[j]);
                    s_log.info("Sent subscription event to RTC for " + "category: " + categories[j]);
                }
            }

            // Close the subscription JMS connection.
            subscriber.close();
        }
    }

}