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//---PACKAGE DECLARATION--- |
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|
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//---IMPORTS--- |
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|
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/** |
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* A small efficient JavaHost |
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* Designed to be used as a working design to build the C++ hosts on. |
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* Hopefully fully functional and thus can be used as part of a test rig. |
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* |
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* @author $Author: ab11 $ |
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* @version $Id: JavaHost.java,v 1.5 2000/12/08 15:44:56 ab11 Exp $ |
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*/ |
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class JavaHost { |
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|
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//---FINAL ATTRIBUTES--- |
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|
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//---STATIC METHODS--- |
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|
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//---CONSTRUCTORS--- |
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|
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/** |
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* Constructor for the class. Takes in the hostname and port number |
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* of the Filter Manager. |
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* |
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*/ |
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public JavaHost( String serverName, int port ){ |
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// create a connection to the filter manager |
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System.out.println("Creating connection with Filter Manager"); |
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Config config = new Config(serverName, port); |
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// the config class knows what values it wants to get from |
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// the configuration system |
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|
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// create a SystemMonitor object and pass the config |
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// as a param so it knows what to do! |
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System.out.println("Creating System Monitor"); |
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SystemMonitor sysMon = new SystemMonitor(config); |
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|
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try { |
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udpcheckInterval = Long.parseLong(config.getProperty("UDPUpdateTime")) * 1000; |
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System.out.println("Configured UDPUpdateTime"); |
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} |
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catch ( NumberFormatException e ){ |
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System.out.println("The value for UDPUpdateTime is invalid, using a default"); |
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// 1 mins |
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udpcheckInterval = 1000 * 60; // 1 minute |
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} |
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|
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try { |
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tcpcheckInterval = Long.parseLong(config.getProperty("TCPUpdateTime")) * 1000; |
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System.out.println("Configured TCPUpdateTime"); |
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} |
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catch ( NumberFormatException e ){ |
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System.out.println("The value for UDPUpdateTime is invalid, using a default"); |
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// 10 mins |
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tcpcheckInterval = 10000 * 60; // 5 minutes |
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} |
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|
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// the current time.. |
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long currentTime = System.currentTimeMillis(); |
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long nextUDP = currentTime + udpcheckInterval; |
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long nextTCP = currentTime + tcpcheckInterval; |
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|
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while ( true ){ |
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currentTime = System.currentTimeMillis(); |
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// keep going for ever and ever ;) |
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|
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if ( nextTCP < nextUDP ){ |
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try { |
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long sleeptime = nextTCP - currentTime; |
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if ( sleeptime > 0 ){ |
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Thread.sleep(sleeptime); |
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} |
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nextTCP += tcpcheckInterval; |
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// send a heartbeat |
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//System.out.println("Sending Heartbeat"); |
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System.out.print("+"); |
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config.sendHeartBeat(); |
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if ( config.reloadConfig() ){ |
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System.out.println("\nRestarting System"); |
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break; |
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} |
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} |
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catch ( InterruptedException e ){ |
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// do nothing |
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} |
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} |
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else { |
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try { |
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long sleeptime = nextUDP - currentTime; |
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if ( sleeptime > 0 ){ |
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Thread.sleep(sleeptime); |
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} |
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nextUDP += udpcheckInterval; |
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// send a heartbeat |
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//System.out.println("Sending UDP Packet"); |
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System.out.print("."); |
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LowLevelNet.sendUDPPacket(config, sysMon.getInfo()); |
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|
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} |
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catch ( InterruptedException e ){ |
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// do nothing |
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} |
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} |
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|
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|
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|
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} // while |
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|
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|
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} // public javahost |
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|
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|
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//---PUBLIC METHODS--- |
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|
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//---PRIVATE METHODS--- |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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//---ATTRIBUTES--- |
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|
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private long udpcheckInterval; |
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private long tcpcheckInterval; |
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private final long defaultUpdateTime = 60000; |
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|
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|
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//---STATIC ATTRIBUTES--- |
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|
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} // class |
