Examples of com.sun.jini.proxy.ThrowThis

com.sun.jini.proxy.ThrowThis
The semi-official way for remote methods on registration objects (e.g LeaseRenewalSet, LookupDiscoveryRegistration, MailboxRegistration) to indicate that the registration no longer exists is to throw NoSuchObjectException. Unfortunately if the registration object is implemented as a smart proxy that uses RMI to communicate back to the server (instead of a straight RMI object) it is not possible for the server to throw NoSuchObjectException directly since RMI will wrap such an exception in a ServerException.
ThrowThis provides a solution to this problem. When the server wants to throw a RemoteException it creates a ThrowThis object that wraps the RemoteException and then throws the ThrowThis. The proxy catches ThrowThis exceptions and in the catch block and calls throwRemoteException to throw the intended exception. @author Sun Microsystems, Inc. @see java.rmi.NoSuchObjectException @see java.rmi.ServerException

        concurrentObj.readLock();
        try {
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                        (new NoSuchObjectException("Invalid registration "
                                                   +"ID on call to "
                                                   +"getRegistrars() method"));
            }//endif
            Collection mVals = (regInfo.discoveredRegsMap).values();

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        concurrentObj.readLock();
        try {
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                            (new NoSuchObjectException("Invalid registration "
                                                       +"ID on call to "
                                                       +"getGroups() method"));
            }//endif
            String[] groups = null;

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        concurrentObj.readLock();
        try {
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                        (new NoSuchObjectException("Invalid registration "
                                                   +"ID on call to "
                                                   +"getLocators() method"));
            }//endif
            return (LookupLocator[])(regInfo.locators).toArray

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        concurrentObj.writeLock();
        try {
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                        (new NoSuchObjectException("Invalid registration "
                                                   +"ID on call to "
                                                   +"addGroups() method"));
            }//endif
            /* Check the input for validity */

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        concurrentObj.writeLock();
        try {
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                        (new NoSuchObjectException("Invalid registration "
                                                   +"ID on call to "
                                                   +"setGroups() method"));
            }//endif
            /* Check the input for validity */

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        concurrentObj.writeLock();
        try {
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                        (new NoSuchObjectException("Invalid registration "
                                                   +"ID on call to "
                                                   +"removeGroups() method"));
            }//endif
            /* Check the input for validity */

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        concurrentObj.writeLock();
        try {
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                        (new NoSuchObjectException("Invalid registration "
                                                   +"ID on call to "
                                                   +"addLocators() method"));
            }//endif
            /* Check the input for validity */

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        concurrentObj.writeLock();
        try {
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                        (new NoSuchObjectException("Invalid registration "
                                                   +"ID on call to "
                                                   +"setLocators() method"));
            }//endif
            /* Check the input for validity */

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        concurrentObj.writeLock();
        try {
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                       (new NoSuchObjectException("Invalid registration "
                                                  +"ID on call to "
                                                  +"removeLocators() method"));
            }//endif
            /* Check the input for validity */

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        try {
            logInfoDiscard("\ndiscard: ",registrationID);
            RegistrationInfo regInfo
                   = (RegistrationInfo)(registrationByID.get(registrationID));
            if(regInfo == null) {
                throw new ThrowThis
                            (new NoSuchObjectException("Invalid registration "
                                                       +"ID on call to "
                                                       +"discard() method"));
            }//endif
            if(registrar == null) {

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