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Diffstat (limited to 'java/src/ServiceConfig.java')
| -rw-r--r-- | java/src/ServiceConfig.java | 375 |
1 files changed, 0 insertions, 375 deletions
diff --git a/java/src/ServiceConfig.java b/java/src/ServiceConfig.java deleted file mode 100644 index e749076137b..00000000000 --- a/java/src/ServiceConfig.java +++ /dev/null @@ -1,375 +0,0 @@ - /************************************************* - * - * = PACKAGE - * JACE.ServiceConfigurator - * - * = FILENAME - * ServiceConfig.java - * - * Services can be suspended, resumed, removed, and reloaded. Reloading requires a - * call to prepareForReload method after removing a service (done in remove()). You can't access - * the ServiceObjects that are loaded directly -- anything loaded with a class loader - * must be wrapped and have its methods called via reflection. This is because a - * loaded class doesn't exist in the same space as one loaded with the system loader. - * - * - *@author Prashant Jain, Everett Anderson - * - *************************************************/ -package JACE.ServiceConfigurator; - -import java.io.*; -import java.util.*; -import java.net.*; -import JACE.OS.*; -import JACE.Misc.*; - -/** - * <hr> - * <p><b>TITLE</b><br> - * Provide the base class that supplies common server daemon - * operations. Also provides a global point for interacting with - * the service repository. - */ -public class ServiceConfig -{ - /** Begins the process of loading a service configurator file: - * parses the command line and calls processDirectives - * - *@exception FileNotFoundException Couldn't find service config file - *@exception IOException Problem reading or parsing - *@exception ClassNotFoundException Couldn't find a certain class - *@exception IllegalAccessException Inappropriate method call on a class - *@exception InstantiationException Couldn't create a certain class instance - */ - public static int open (String [] args) throws FileNotFoundException, IOException, ClassNotFoundException, IllegalAccessException, InstantiationException - { - // Parse the command line - ServiceConfig.parseArgs (args); - - // Create a repository and class loader - if (ServiceConfig.svcRep_ == null) - ServiceConfig.svcRep_ = new ServiceRepository (); - if (ServiceConfig.loader_ == null) - ServiceConfig.loader_ = new ServiceLoader(); - - return ServiceConfig.processDirectives (); - - } - - /** Parses the command line - * Valid command line options: - * -b Run as a daemon (not implemented yet) - * -d Debug mode - * -n No defaults - * -f <filename> Load services in the given file [see below for info] - * - */ - protected static void parseArgs (String [] args) - { - GetOpt getopt = new GetOpt (args, "bdnf:"); - for (int c; (c = getopt.next ()) != -1; ) - switch (c) - { - case 'b': - // Note: not supported yet! - ServiceConfig.beADaemon_ = true; - break; - case 'd': - ServiceConfig.debug_ = true; - break; - case 'n': - ServiceConfig.noDefaults_ = true; - break; - case 'f': - ServiceConfig.serviceConfigFile_ = getopt.optarg (); - break; - default: - ACE.ERROR ((char ) c + " is not a ServiceConfig option"); - break; - } - } - - /** Called by ParseNode subclass - * Asks the Service Repository to spend a service - */ - public static int suspend (String name) - { - return svcRep_.suspend(name); - } - - /** Called by ParseNode subclass - * Asks the Service Repository to resume a service - */ - public static int resume (String name) - { - return svcRep_.resume(name); - } - - /** Called by ParseNode subclass - * Asks the Service Repository to remove a service, also calls - * prepareForReload so the user doesn't have to. - */ - public static int remove (String name) - { - int result = svcRep_.remove(name); - - prepareForReload(); - - return result; - } - - /** Should be called before the user wants to reload - * a service. This calls garbage collection to - * (hopefully) obliterate the names of any unused - * service classes, and creates a new instance - * of the ClassLoader so there won't be problems - * reloading. - */ - public static void prepareForReload() - { - ServiceConfig.loader_ = new ServiceLoader(); - - System.gc(); - - } - - /** - * Parse a service configurator file, creating classes as necessary - * - * This is getting complicated, but there were too many installation problems when using - * CUP and JLex to merit developing a grammar. - * - * Current formats: - * - * load <Service Name> <Full Class Name> Service_Object "<argument list>" - * - * resume <Service Name> - * suspend <Service Name> - * remove <Service Name> - * - *@exception FileNotFoundException Couldn't find the file (default "svc.conf") - *@exception IOException Problem reading/parsing - *@exception ClassNotFoundException Couldn't find a certain class - *@exception IllegalAccessException Inappropriate method call - *@exception InstantiationException Couldn't create a class instance - */ - protected static int processDirectives () throws FileNotFoundException, IOException, ClassNotFoundException, IllegalAccessException, InstantiationException - { - if (ServiceConfig.serviceConfigFile_ == null) - ServiceConfig.serviceConfigFile_ = "svc.conf"; - - ACE.DEBUG("Processing directives in file " + ServiceConfig.serviceConfigFile_); - - File configFile = new File (ServiceConfig.serviceConfigFile_); - - // Check if file exists and is a normal file - if (!configFile.exists () || !configFile.isFile ()) - throw new FileNotFoundException ("File " + ServiceConfig.serviceConfigFile_ + " not found"); - - // Check if the file is readable - if (!configFile.canRead ()) - throw new IOException ("File " + ServiceConfig.serviceConfigFile_ + " not readable"); - - // Set up the stream - FileInputStream fileIn = new FileInputStream (configFile); - - // Parse the file - Reader r = new BufferedReader(new InputStreamReader(fileIn)); - StreamTokenizer in = new StreamTokenizer (r); - - // Set '#' as comment character to be ignored and set '/' as - // ordinary character (was original comment character) - // in.commentChar ('#'); - in.ordinaryChar ('/'); - - // Set characters in ASCII range 33 to 47, ASCII range 91 to 96, - // and ASCII range 123 to 126 as ordinary characters - in.wordChars ('!', '/'); // ASCII range 33 to 47 - in.wordChars (':', '@'); // ASCII range 58 to 64 - in.wordChars ('[', '`'); // ASCII range 91 to 96 - in.wordChars ('{', '~'); // ASCII range 123 to 126 - - String commandName = null; - String serviceName = null; - String className = null; - String classType = null; - String args = null; - // Create a state machine - int state = ServiceConfig.COMMAND_NAME; - - // The apply() method on ParseNode starts the process of actually executing the - // desired action (suspend, load, etc) - ParseNode result = null; - - while (in.nextToken () != StreamTokenizer.TT_EOF) - { - switch (state) - { - case ServiceConfig.COMMAND_NAME: - if (in.ttype == StreamTokenizer.TT_WORD) { - commandName = in.sval; - - // **** This should be changed so that instantiation is only done - // when we find out the type (ServiceObject or something else) a few - // words later. Right now it works because we only have ServiceObjects - // to load. - if (commandName.equals("load")) - result = new AddServiceObjectNode(); - else - if (commandName.equals("remove")) - result = new RemoveNode(); - else - if (commandName.equals("suspend")) - result = new SuspendNode(); - else - if (commandName.equals("resume")) - result = new ResumeNode(); - else - throw new IOException ("COMMAND NAME missing or invalid: " + commandName); - - ACE.DEBUG("Command node type: " + ((Object)result).getClass().getName()); - - - } else - throw new IOException ("Illegal COMMAND NAME argument in file " + ServiceConfig.serviceConfigFile_); - state = ServiceConfig.SERVICE_NAME; - break; - case ServiceConfig.SERVICE_NAME: - if (in.ttype == StreamTokenizer.TT_WORD) - serviceName = in.sval; - else - throw new IOException ("Illegal SERVICE NAME argument in file " + ServiceConfig.serviceConfigFile_); - - - if (!commandName.equals("load")) { - result.init(serviceName); - result.apply(); - in.whitespaceChars (' ', ' '); - state = ServiceConfig.SERVICE_NAME; - } else - state = ServiceConfig.CLASS_NAME; - break; - case ServiceConfig.CLASS_NAME: - if (in.ttype == StreamTokenizer.TT_WORD) - className = in.sval; - else - throw new IOException ("Illegal CLASS NAME argument in file " + ServiceConfig.serviceConfigFile_); - state = ServiceConfig.CLASS_TYPE; - break; - case ServiceConfig.CLASS_TYPE: - // This is only Service_Object or ServiceObject at this time - if (in.ttype == StreamTokenizer.TT_WORD) - classType = in.sval; - else - throw new IOException ("Illegal CLASS TYPE argument in file " + ServiceConfig.serviceConfigFile_); - state = ServiceConfig.ARGS; - // Set space to be an ordinary character to allow - // arguments to be parsed in - in.wordChars (' ', ' '); - break; - case ServiceConfig.ARGS: - ACE.DEBUG("Processing arguments"); - - args = new String(""); - - if (in.ttype == StreamTokenizer.TT_WORD) - { - args = in.sval; - - // If just two double quotes, there are no args - if (args.length() == 2) { - args = new String(""); - } else - args = args.substring(1, args.length() - 1); - } - - // Quick hack until more parsing necessary -- set the needed data - ((AddServiceObjectNode)result).init(serviceName, className, false); - ((AddServiceObjectNode)result).params(args); - - result.apply(); - - state = ServiceConfig.SERVICE_NAME; - // Set space back to whitespace-character to extract the - // next token - in.whitespaceChars (' ', ' '); - break; - default: - throw new IOException ("Illegal argument in file " + ServiceConfig.serviceConfigFile_); - } - } - return 0; - } - - - /** - * This is called when apply() is called on AddServiceObjectNodes. Similar - * methods could be developed for later data types (AddStreamNode, etc). This - * tries to load the ServiceObject and its classes. When trying to find info - * from the C++ files, this generates possible file paths. - */ - public static int initialize (AddServiceObjectNode son) - { - Class c = null; - - try { - - c = loader_.loadClass(son.locator(), true); - - } catch (ClassNotFoundException e) { - ACE.ERROR("Can't find class with locator: " + son.locator()); - return -1; - } - - try { - - Object service = c.newInstance(); - // Can't cast this to a ServiceObject, even though it will look just - // like one -- Java puts things loaded with a non-standard class loader - // in their own name space. The ServiceObjectRecord is a wrapper that - // gets around this by using reflection. - ServiceObjectRecord svcObjRec = new ServiceObjectRecord(service, son.name()); - - // Split the argument array up into smaller pieces - String [] argArray = OS.createStringArray (son.params(), " "); - - // Initialize the service -- start it running - svcObjRec.init(argArray); - - // Put it in the service repository - svcRep_.insert((ServiceRecord)svcObjRec); - - } catch (IllegalAccessException e) { - ACE.ERROR("Error " + e); - return -1; - } catch (InstantiationException e) { - ACE.ERROR("Error " + e); - return -1; - } - - return 0; - } - - // Set by command line options - private static boolean beADaemon_ = false; - private static boolean debug_ = false; - private static boolean noDefaults_ = false; - - public static String serviceConfigFile_ = "svc.conf"; - - private static ServiceRepository svcRep_ = null; - private static ServiceLoader loader_ = null; - - // States for the state-machine used in parsing the config file - private final static int SERVICE_NAME = 0; - private final static int CLASS_NAME = 1; - private final static int CLASS_TYPE = 2; - private final static int ARGS = 3; - private final static int COMMAND_NAME = 4; - - -} - - - |