Package com.sun.ejb

Examples of com.sun.ejb.MethodLockInfo

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            // EJB2.0 section 7.6
            throw new NoSuchObjectLocalException("The EJB does not exist."
                    + " session-key: " + sessionKey);
        }

        MethodLockInfo lockInfo = inv.invocationInfo.methodLockInfo;
        boolean allowSerializedAccess =
                (lockInfo == null) || (lockInfo.getTimeout() != CONCURRENCY_NOT_ALLOWED);

        if( allowSerializedAccess ) {

            boolean blockWithTimeout =
                    (lockInfo != null) && (lockInfo.getTimeout() != BLOCK_INDEFINITELY);

            if( blockWithTimeout ) {
                try {
                    boolean acquired = sc.getStatefulWriteLock().tryLock(lockInfo.getTimeout(),
                            lockInfo.getTimeUnit());
                    if( !acquired ) {
                        String msg = "Serialized access attempt on method " + inv.beanMethod +
                            " for ejb " + ejbDescriptor.getName() + " timed out after " +
                             + lockInfo.getTimeout() + " " + lockInfo.getTimeUnit();
                        throw new ConcurrentAccessTimeoutException(msg);
                    }

                } catch(InterruptedException ie)  {
                    String msg = "Serialized access attempt on method " + inv.beanMethod +
                            " for ejb " + ejbDescriptor.getName() + " was interrupted within " +
                             + lockInfo.getTimeout() + " " + lockInfo.getTimeUnit();
                    ConcurrentAccessException cae = new ConcurrentAccessTimeoutException(msg);
                    cae.initCause(ie);
                    throw cae;
                }
            } else {
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    }

    private void setConcurrencyInvInfo(Method invInfoMethod, String methodIntf,
                                       InvocationInfo invInfo) {

        MethodLockInfo lockInfo = null;

        // Set READ/WRITE lock info.  Only applies to singleton beans.
        if( isSingleton ) {
            EjbSessionDescriptor singletonDesc = (EjbSessionDescriptor) ejbDescriptor;
            List<MethodDescriptor> readLockMethods = singletonDesc.getReadLockMethods();
            List<MethodDescriptor> writeLockMethods = singletonDesc.getWriteLockMethods();

            for(MethodDescriptor readLockMethodDesc : readLockMethods) {
                Method readLockMethod = readLockMethodDesc.getMethod(singletonDesc);
                if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, readLockMethod)) {

                    lockInfo = new MethodLockInfo();
                    lockInfo.setLockType(LockType.READ);
                    break;
                }
            }

            if( lockInfo == null ) {
                for(MethodDescriptor writeLockMethodDesc : writeLockMethods) {
                    Method writeLockMethod = writeLockMethodDesc.getMethod(singletonDesc);
                    if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, writeLockMethod)) {

                        lockInfo = new MethodLockInfo();
                        lockInfo.setLockType(LockType.WRITE);
                        break;
                    }
                }
            }
        }

        // Set AccessTimeout info
        if( isSingleton || isStatefulSession ) {

            EjbSessionDescriptor sessionDesc = (EjbSessionDescriptor) ejbDescriptor;
            List<EjbSessionDescriptor.AccessTimeoutHolder> accessTimeoutInfo =
                    sessionDesc.getAccessTimeoutInfo();


            for(EjbSessionDescriptor.AccessTimeoutHolder accessTimeoutHolder : accessTimeoutInfo) {
                MethodDescriptor accessTimeoutMethodDesc = accessTimeoutHolder.method;
                Method accessTimeoutMethod = accessTimeoutMethodDesc.getMethod(sessionDesc);
                if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, accessTimeoutMethod)) {

                    if( lockInfo == null ) {
                        lockInfo = new MethodLockInfo();
                    }

                    lockInfo.setTimeout(accessTimeoutHolder.value , accessTimeoutHolder.unit);

                    break;
                }
            }
        }
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    }

    private void setConcurrencyInvInfo(Method invInfoMethod, String methodIntf,
                                       InvocationInfo invInfo) {

        MethodLockInfo lockInfo = null;

        // Set READ/WRITE lock info.  Only applies to singleton beans.
        if( isSingleton ) {
            EjbSessionDescriptor singletonDesc = (EjbSessionDescriptor) ejbDescriptor;
            List<MethodDescriptor> readLockMethods = singletonDesc.getReadLockMethods();
            List<MethodDescriptor> writeLockMethods = singletonDesc.getWriteLockMethods();

            for(MethodDescriptor readLockMethodDesc : readLockMethods) {
                Method readLockMethod = readLockMethodDesc.getMethod(singletonDesc);
                if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, readLockMethod)) {

                    lockInfo = new MethodLockInfo();
                    lockInfo.setLockType(LockType.READ);
                    break;
                }
            }

            if( lockInfo == null ) {
                for(MethodDescriptor writeLockMethodDesc : writeLockMethods) {
                    Method writeLockMethod = writeLockMethodDesc.getMethod(singletonDesc);
                    if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, writeLockMethod)) {

                        lockInfo = new MethodLockInfo();
                        lockInfo.setLockType(LockType.WRITE);
                        break;
                    }
                }
            }
        }

        // Set AccessTimeout info
        if( isSingleton || isStatefulSession ) {

            EjbSessionDescriptor sessionDesc = (EjbSessionDescriptor) ejbDescriptor;
            List<EjbSessionDescriptor.AccessTimeoutHolder> accessTimeoutInfo =
                    sessionDesc.getAccessTimeoutInfo();


            for(EjbSessionDescriptor.AccessTimeoutHolder accessTimeoutHolder : accessTimeoutInfo) {
                MethodDescriptor accessTimeoutMethodDesc = accessTimeoutHolder.method;
                Method accessTimeoutMethod = accessTimeoutMethodDesc.getMethod(sessionDesc);
                if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, accessTimeoutMethod)) {

                    if( lockInfo == null ) {
                        lockInfo = new MethodLockInfo();
                    }

                    lockInfo.setTimeout(accessTimeoutHolder.value , accessTimeoutHolder.unit);

                    break;
                }
            }
        }
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            // EJB2.0 section 7.6
            throw new NoSuchObjectLocalException("The EJB does not exist."
                    + " session-key: " + sessionKey);
        }

        MethodLockInfo lockInfo = inv.invocationInfo.methodLockInfo;
        boolean allowSerializedAccess =
                (lockInfo == null) || (lockInfo.getTimeout() != CONCURRENCY_NOT_ALLOWED);

        if( allowSerializedAccess ) {

            boolean blockWithTimeout =
                    (lockInfo != null) && (lockInfo.getTimeout() != BLOCK_INDEFINITELY);

            if( blockWithTimeout ) {
                try {
                    boolean acquired = sc.getStatefulWriteLock().tryLock(lockInfo.getTimeout(),
                            lockInfo.getTimeUnit());
                    if( !acquired ) {
                        String msg = "Serialized access attempt on method " + inv.beanMethod +
                            " for ejb " + ejbDescriptor.getName() + " timed out after " +
                             + lockInfo.getTimeout() + " " + lockInfo.getTimeUnit();
                        throw new ConcurrentAccessTimeoutException(msg);
                    }

                } catch(InterruptedException ie)  {
                    String msg = "Serialized access attempt on method " + inv.beanMethod +
                            " for ejb " + ejbDescriptor.getName() + " was interrupted within " +
                             + lockInfo.getTimeout() + " " + lockInfo.getTimeUnit();
                    ConcurrentAccessException cae = new ConcurrentAccessTimeoutException(msg);
                    cae.initCause(ie);
                    throw cae;
                }
            } else {
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            // EJB2.0 section 7.6
            throw new NoSuchObjectLocalException("The EJB does not exist."
                    + " session-key: " + sessionKey);
        }

        MethodLockInfo lockInfo = inv.invocationInfo.methodLockInfo;
        boolean allowSerializedAccess =
                (lockInfo == null) || (lockInfo.getTimeout() != CONCURRENCY_NOT_ALLOWED);

        if( allowSerializedAccess ) {

            boolean blockWithTimeout =
                    (lockInfo != null) && (lockInfo.getTimeout() != BLOCK_INDEFINITELY);

            if( blockWithTimeout ) {
                try {
                    boolean acquired = sc.getStatefulWriteLock().tryLock(lockInfo.getTimeout(),
                            lockInfo.getTimeUnit());
                    if( !acquired ) {
                        String msg = "Serialized access attempt on method " + inv.beanMethod +
                            " for ejb " + ejbDescriptor.getName() + " timed out after " +
                             + lockInfo.getTimeout() + " " + lockInfo.getTimeUnit();
                        throw new ConcurrentAccessTimeoutException(msg);
                    }

                } catch(InterruptedException ie)  {
                    String msg = "Serialized access attempt on method " + inv.beanMethod +
                            " for ejb " + ejbDescriptor.getName() + " was interrupted within " +
                             + lockInfo.getTimeout() + " " + lockInfo.getTimeUnit();
                    ConcurrentAccessException cae = new ConcurrentAccessTimeoutException(msg);
                    cae.initCause(ie);
                    throw cae;
                }
            } else {
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            // EJB2.0 section 7.6
            throw new NoSuchObjectLocalException("The EJB does not exist."
                    + " session-key: " + sessionKey);
        }

        MethodLockInfo lockInfo = inv.invocationInfo.methodLockInfo;
        boolean allowSerializedAccess =
                (lockInfo == null) || (lockInfo.getTimeout() != CONCURRENCY_NOT_ALLOWED);

        if( allowSerializedAccess ) {

            boolean blockWithTimeout =
                    (lockInfo != null) && (lockInfo.getTimeout() != BLOCK_INDEFINITELY);

            if( blockWithTimeout ) {
                try {
                    boolean acquired = sc.getStatefulWriteLock().tryLock(lockInfo.getTimeout(),
                            lockInfo.getTimeUnit());
                    if( !acquired ) {
                        String msg = "Serialized access attempt on method " + inv.beanMethod +
                            " for ejb " + ejbDescriptor.getName() + " timed out after " +
                             + lockInfo.getTimeout() + " " + lockInfo.getTimeUnit();
                        throw new ConcurrentAccessTimeoutException(msg);
                    }

                } catch(InterruptedException ie)  {
                    String msg = "Serialized access attempt on method " + inv.beanMethod +
                            " for ejb " + ejbDescriptor.getName() + " was interrupted within " +
                             + lockInfo.getTimeout() + " " + lockInfo.getTimeUnit();
                    ConcurrentAccessException cae = new ConcurrentAccessTimeoutException(msg);
                    cae.initCause(ie);
                    throw cae;
                }
            } else {
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    }

    private void setConcurrencyInvInfo(Method invInfoMethod, String methodIntf,
                                       InvocationInfo invInfo) {

        MethodLockInfo lockInfo = null;

        // Set READ/WRITE lock info.  Only applies to singleton beans.
        if( isSingleton ) {
            EjbSessionDescriptor singletonDesc = (EjbSessionDescriptor) ejbDescriptor;
            List<MethodDescriptor> readLockMethods = singletonDesc.getReadLockMethods();
            List<MethodDescriptor> writeLockMethods = singletonDesc.getWriteLockMethods();

            for(MethodDescriptor readLockMethodDesc : readLockMethods) {
                Method readLockMethod = readLockMethodDesc.getMethod(singletonDesc);
                if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, readLockMethod)) {

                    lockInfo = new MethodLockInfo();
                    lockInfo.setLockType(LockType.READ);
                    break;
                }
            }

            if( lockInfo == null ) {
                for(MethodDescriptor writeLockMethodDesc : writeLockMethods) {
                    Method writeLockMethod = writeLockMethodDesc.getMethod(singletonDesc);
                    if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, writeLockMethod)) {

                        lockInfo = new MethodLockInfo();
                        lockInfo.setLockType(LockType.WRITE);
                        break;
                    }
                }
            }
        }

        // Set AccessTimeout info
        if( isSingleton || isStatefulSession ) {

            EjbSessionDescriptor sessionDesc = (EjbSessionDescriptor) ejbDescriptor;
            List<EjbSessionDescriptor.AccessTimeoutHolder> accessTimeoutInfo =
                    sessionDesc.getAccessTimeoutInfo();


            for(EjbSessionDescriptor.AccessTimeoutHolder accessTimeoutHolder : accessTimeoutInfo) {
                MethodDescriptor accessTimeoutMethodDesc = accessTimeoutHolder.method;
                Method accessTimeoutMethod = accessTimeoutMethodDesc.getMethod(sessionDesc);
                if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, accessTimeoutMethod)) {

                    if( lockInfo == null ) {
                        lockInfo = new MethodLockInfo();
                    }

                    lockInfo.setTimeout(accessTimeoutHolder.value , accessTimeoutHolder.unit);

                    break;
                }
            }
        }
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    }

    private void setConcurrencyInvInfo(Method invInfoMethod, String methodIntf,
                                       InvocationInfo invInfo) {

        MethodLockInfo lockInfo = null;

        // Set READ/WRITE lock info.  Only applies to singleton beans.
        if( isSingleton ) {
            EjbSessionDescriptor singletonDesc = (EjbSessionDescriptor) ejbDescriptor;
            List<MethodDescriptor> readLockMethods = singletonDesc.getReadLockMethods();
            List<MethodDescriptor> writeLockMethods = singletonDesc.getWriteLockMethods();

            for(MethodDescriptor readLockMethodDesc : readLockMethods) {
                Method readLockMethod = readLockMethodDesc.getMethod(singletonDesc);
                if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, readLockMethod)) {

                    lockInfo = new MethodLockInfo();
                    lockInfo.setLockType(LockType.READ);
                    break;
                }
            }

            if( lockInfo == null ) {
                for(MethodDescriptor writeLockMethodDesc : writeLockMethods) {
                    Method writeLockMethod = writeLockMethodDesc.getMethod(singletonDesc);
                    if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, writeLockMethod)) {

                        lockInfo = new MethodLockInfo();
                        lockInfo.setLockType(LockType.WRITE);
                        break;
                    }
                }
            }
        }

        // Set AccessTimeout info
        if( isSingleton || isStatefulSession ) {

            EjbSessionDescriptor sessionDesc = (EjbSessionDescriptor) ejbDescriptor;
            List<EjbSessionDescriptor.AccessTimeoutHolder> accessTimeoutInfo =
                    sessionDesc.getAccessTimeoutInfo();


            for(EjbSessionDescriptor.AccessTimeoutHolder accessTimeoutHolder : accessTimeoutInfo) {
                MethodDescriptor accessTimeoutMethodDesc = accessTimeoutHolder.method;
                Method accessTimeoutMethod = accessTimeoutMethodDesc.getMethod(sessionDesc);
                if(implMethodMatchesInvInfoMethod(invInfoMethod, methodIntf, accessTimeoutMethod)) {

                    if( lockInfo == null ) {
                        lockInfo = new MethodLockInfo();
                    }

                    lockInfo.setTimeout(accessTimeoutHolder.value , accessTimeoutHolder.unit);

                    break;
                }
            }
        }
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    public CMCSingletonContainer(EjbDescriptor desc, ClassLoader cl)
            throws Exception {
        super(desc, cl);

        // In absence of any method lock info default is WRITE lock with no timeout.
        defaultMethodLockInfo = new MethodLockInfo();
        defaultMethodLockInfo.setLockType(LockType.WRITE);

    }
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     */
    protected ComponentContext _getContext(EjbInvocation inv) {
        checkInit();
        InvocationInfo invInfo = inv.invocationInfo;

        MethodLockInfo lockInfo = (invInfo.methodLockInfo == null)
                ? defaultMethodLockInfo : invInfo.methodLockInfo;
        Lock theLock = lockInfo.isReadLockedMethod() ? readLock : writeLock;

        if ( (rwLock.getReadHoldCount() > 0) &&
             (!rwLock.isWriteLockedByCurrentThread()) ) {
            if( lockInfo.isWriteLockedMethod() ) {
                throw new IllegalLoopbackException("Illegal Reentrant Access : Attempt to make " +
                        "a loopback call on a Write Lock method '" + invInfo.targetMethod1 +
                        "' while a Read lock is already held");
            }
        }


        /*
         * Please see comment at the beginning of the method.
         * Even though the method doesn't unlock the (possibly) acquired
         * lock, the lock is guaranteed to be unlocked in releaseContext()
         * even if exceptions were thrown in _getContext()
         */
        if (!lockInfo.hasTimeout() ||
            ( (lockInfo.hasTimeout() && (lockInfo.getTimeout() == BLOCK_INDEFINITELY) )) ) {
            theLock.lock();
        } else {
            try {
                boolean lockStatus = theLock.tryLock(lockInfo.getTimeout(), lockInfo.getTimeUnit());
                if (! lockStatus) {
                    String msg = "Couldn't acquire a lock within " + lockInfo.getTimeout() +
                            " " + lockInfo.getTimeUnit();
                    if( lockInfo.getTimeout() == NO_BLOCKING ) {
                        throw new ConcurrentAccessException(msg);
                    } else {
                        throw new ConcurrentAccessTimeoutException(msg);
                    }
                }
            } catch (InterruptedException inEx) {
                String msg = "Couldn't acquire a lock within " + lockInfo.getTimeout() +
                        " " + lockInfo.getTimeUnit();
                ConcurrentAccessException cae = (lockInfo.getTimeout() == NO_BLOCKING) ?
                        new ConcurrentAccessException(msg) : new ConcurrentAccessTimeoutException(msg);
                cae.initCause(inEx);
                throw cae;
            }
        }
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Related Classes of com.sun.ejb.MethodLockInfo

  • com.sun.ejb.containers.BaseContainer
  • com.sun.ejb.containers.CMCSingletonContainer
  • com.sun.ejb.containers.StatefulSessionContainer
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