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package uk.ac.ukc.iscream.componentmanager; |
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.util.Component; |
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import uk.ac.ukc.iscream.util.ReferenceManager; |
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import uk.ac.ukc.iscream.util.*; |
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import java.util.*; |
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import java.io.*; |
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/** |
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* The component manager is the starting point for all |
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* server side components of the iscream system. |
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* It loads its initial system configuration from the |
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* default properties file, it then starts all the iscream |
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* components as specified in the default.properties under |
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* uk.ac.ukc.iscream.ComponentList |
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* |
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* |
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* @author $Author$ |
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* @version $Id$ |
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*/ |
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/** |
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* The toString() of this class |
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* As it won't be instatiated, this is needed. |
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* Not also that we pass a null as the class name (as we are static) |
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*/ |
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public static final String toString = "ComponentManager(" + REVISION.substring(11, REVISION.length() - 2) + ")"; |
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public static final String toString = FormatName.getName("ComponentManager", null, REVISION); |
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/** |
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* The default location of the properties file for the system |
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*/ |
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public static final String DEFAULTPROPERTIES = "default.properties"; |
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public static final String DEFAULTPROPERTIES = "./etc/default.properties"; |
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//---STATIC METHODS--- |
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/** |
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* The main method which starts the CORE |
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* Currently the args are passed direct to the ORB, |
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* so any ORB paramaters could go there. |
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* The main method which starts the components as |
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* listed in the default.properties file. |
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* |
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* @param args the command line arguments |
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*/ |
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public static void main(String[] args) { |
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System.out.println("--- I-Scream System Component Manager ---"); |
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System.out.println("--- Starting System ---"); |
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// get the command line args |
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// this is a bit messy and should be looked at |
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String defaultProperties = DEFAULTPROPERTIES; |
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System.out.println(toString + ": coming up"); |
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// start the ORB by initialising the ReferenceManager |
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ReferenceManager refman = ReferenceManager.init(null, null); |
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ReferenceManager refman = ReferenceManager.getInstance(); |
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// now we are running, we just need to serve |
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// so we ask the orb to block for us until it has finished |
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// now the ORB is running, we need to activate our RootPOA |
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// so that we can start serving requests once servants start up |
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refman.activatePOA(); |
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// get the list of components |
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String componentList = System.getProperty("uk.ac.ukc.iscream.ComponentList"); |
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StringTokenizer st = new StringTokenizer(componentList, ";"); |
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String componentName = st.nextToken(); |
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Component component = null; |
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System.out.println(toString + ": starting component - " + componentName); |
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if (componentName.equalsIgnoreCase("CoRe")) { |
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// ### This is where the list of supported components is checked! ### |
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if (componentName.equalsIgnoreCase("core")) { |
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component = new uk.ac.ukc.iscream.core.Core(); |
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} else if (componentName.equalsIgnoreCase("filtermanager")) { |
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component = new uk.ac.ukc.iscream.filtermanager.FilterManager(); |
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} else if (componentName.equalsIgnoreCase("rootfilter")) { |
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component = new uk.ac.ukc.iscream.rootfilter.RootFilter(); |
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} else if (componentName.equalsIgnoreCase("dbinterface")) { |
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component = new uk.ac.ukc.iscream.dbinterface.DBInterface(); |
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} |
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// ### Add new component constructors in the above section! ### |
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if (component != null) { |
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boolean result = component.start(); |
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if (result == false) { |
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try { |
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component.start(); |
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} catch (ComponentStartException e) { |
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System.err.println(toString + ": ERROR starting component - " + componentName); |
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System.err.println(toString + ": component reports - " + e.getMessage()); |
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System.exit(1); |
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} |
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} else { |
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System.err.println(toString + ": WARNING unsupported component not started"); |
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} |
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} |
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System.out.println(toString + ": finished - blocking on ORB"); |
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//refman.activatePOA(); |
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System.out.println(toString + ": running"); |
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// block on the ORB...in time, management functionality can be placed here. |
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refman.getORB().run(); |
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} |
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/** |
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/** |
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* A simple method to print the usage of this class. |
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* It never returns, but instead exits to the system |
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* with a value 1, to indicate the system did not start |
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System.out.println("USAGE: java uk.ac.ukc.iscream.componentmanager.ComponentManager <option>"); |
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System.out.println("WHERE <option>:"); |
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System.out.println(" -l <filename> - the location of initial system properties"); |
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System.out.println(" the default is ./etc/default.properties"); |
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System.out.println(" -f <name> - the name of the filter (if there is one configured"); |
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System.out.println(" -h - this help screen"); |
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System.exit(1); |
