public Object invokeHome(Invocation mi) throws Exception {
EntityEnterpriseContext ctx = (EntityEnterpriseContext) mi.getEnterpriseContext();
Transaction tx = mi.getTransaction();
Object rtn = getNext().invokeHome(mi);
// An anonymous context was sent in, so if it has an id it is a real instance now
if (ctx.getId() != null) {
// it doesn't need to be read, but it might have been changed from the db already.
ctx.setValid(true);
if (tx != null) {
BeanLock lock = container.getLockManager().getLock(ctx.getCacheKey());
try {
lock.schedule(mi);
register(ctx, tx); // Set tx
lock.endInvocation(mi);
} finally {
container.getLockManager().removeLockRef(lock.getId());
}
}
}
return rtn;
}
/** Do some validation of the incoming parameters */
protected void validateArguments(Invocation mi) {
if (mi.getType() == InvocationType.REMOTE) {
Object[] params = mi.getArguments();
for (int i = 0; i < params.length; i++) {
Object obj = params[i];
if (obj instanceof TimerHandle)
throw new IllegalArgumentException("Cannot pass TimerHandle through remote interface");
}
}
}
/** Do some validation of the return value */
protected Object validateReturnValue(Invocation mi, Object retValue) {
if (mi.getType() == InvocationType.REMOTE) {
if (retValue instanceof TimerHandle)
throw new IllegalArgumentException("Cannot return TimerHandle from remote interface");
}
return retValue;
}
public Object invoke(Invocation mi) throws Exception {
// We are going to work with the context a lot
EntityEnterpriseContext ctx = (EntityEnterpriseContext) mi.getEnterpriseContext();
// The Tx coming as part of the Method Invocation
Transaction tx = mi.getTransaction();
if (log.isTraceEnabled()) log.trace("invoke called for ctx " + ctx + ", tx=" + tx);
if (!ctx.isValid()) {
container.getPersistenceManager().loadEntity(ctx);
ctx.setValid(true);
}
// mark the context as read only if this is a readonly method and the context
// was not already readonly
boolean didSetReadOnly = false;
if (!ctx.isReadOnly()
&& (container.isReadOnly()
|| container.getBeanMetaData().isMethodReadOnly(mi.getMethod()))) {
ctx.setReadOnly(true);
didSetReadOnly = true;
}
// So we can go on with the invocation
// Invocation with a running Transaction
try {
if (tx != null && tx.getStatus() != Status.STATUS_NO_TRANSACTION) {
// readonly does not synchronize, lock or belong with transaction.
boolean isReadOnly = container.isReadOnly();
if (isReadOnly == false) {
Method method = mi.getMethod();
if (method != null)
isReadOnly = container.getBeanMetaData().isMethodReadOnly(method.getName());
}
try {
if (isReadOnly == false) {
// register the wrapper with the transaction monitor (but only
// register once). The transaction demarcation will trigger the
// storage operations
register(ctx, tx);
}
// Invoke down the chain
Object retVal = getNext().invoke(mi);
// Register again as a finder in the middle of a method
// will de-register this entity, and then the rest of the method can
// change fields which will never be stored
if (isReadOnly == false) {
// register the wrapper with the transaction monitor (but only
// register once). The transaction demarcation will trigger the
// storage operations
register(ctx, tx);
}
// return the return value
return retVal;
} finally {
// We were read-only and the context wasn't already synchronized, tidyup the cache
if (isReadOnly && ctx.hasTxSynchronization() == false) {
switch (commitOption) {
// Keep instance active, but invalidate state
case ConfigurationMetaData.B_COMMIT_OPTION:
// Invalidate state (there might be other points of entry)
ctx.setValid(false);
break;
// Invalidate everything AND Passivate instance
case ConfigurationMetaData.C_COMMIT_OPTION:
try {
// FIXME: We cannot passivate here, because previous
// interceptors work with the context, in particular
// the re-entrance interceptor is doing lock counting
// Just remove it from the cache
if (ctx.getId() != null) container.getInstanceCache().remove(ctx.getId());
} catch (Exception e) {
log.debug("Exception releasing context", e);
}
break;
}
}
}
} else {
// No tx
try {
Object result = getNext().invoke(mi);
// Store after each invocation -- not on exception though, or removal
// And skip reads too ("get" methods)
if (ctx.getId() != null && !container.isReadOnly()) {
container.invokeEjbStore(ctx);
container.storeEntity(ctx);
}
return result;
} catch (Exception e) {
// Exception - force reload on next call
ctx.setValid(false);
throw e;
} finally {
switch (commitOption) {
// Keep instance active, but invalidate state
case ConfigurationMetaData.B_COMMIT_OPTION:
// Invalidate state (there might be other points of entry)
ctx.setValid(false);
break;
// Invalidate everything AND Passivate instance
case ConfigurationMetaData.C_COMMIT_OPTION:
try {
// Do not call release if getId() is null. This means that
// the entity has been removed from cache.
// release will schedule a passivation and this removed ctx
// could be put back into the cache!
// This is necessary because we have no lock, we
// don't want to return an instance to the pool that is
// being used
if (ctx.getId() != null) container.getInstanceCache().remove(ctx.getId());
} catch (Exception e) {
log.debug("Exception releasing context", e);
}
break;
}
}
}
} finally {
// if we marked the context as read only we need to reset it
if (didSetReadOnly) {
ctx.setReadOnly(false);
}
}
}
/**
* Implementation of the server invoker handler interface. Will take the invocation request and
* invoke down the interceptor chain.
*
* @param invocationReq
* @return response of the invocation
* @throws Throwable
*/
public Object invoke(InvocationRequest invocationReq) throws Throwable {
Invocation invocation = (Invocation) invocationReq.getParameter();
Thread currentThread = Thread.currentThread();
ClassLoader oldCl = currentThread.getContextClassLoader();
ObjectName mbean = null;
try {
mbean = (ObjectName) Registry.lookup(invocation.getObjectName());
/** Clustering * */
long clientViewId = ((Long) invocation.getValue("CLUSTER_VIEW_ID")).longValue();
HATarget target = (HATarget) beanMap.get(invocation.getObjectName());
if (target == null) {
// We could throw IllegalStateException but we have a race condition that could occur:
// when we undeploy a bean, the cluster takes some time to converge
// and to recalculate a new viewId and list of replicant for each HATarget.
// Consequently, a client could own an up-to-date list of the replicants
// (before the cluster has converged) and try to perform an invocation
// on this node where the HATarget no more exist, thus receiving a
// wrong exception and no failover is performed with an IllegalStateException
//
throw new GenericClusteringException(
GenericClusteringException.COMPLETED_NO,
"target is not/no more registered on this node");
}
if (!target.invocationsAllowed()) {
throw new GenericClusteringException(
GenericClusteringException.COMPLETED_NO,
"invocations are currently not allowed on this target");
}
/** End Clustering * */
// The cl on the thread should be set in another interceptor
Object obj =
getServer()
.invoke(mbean, "invoke", new Object[] {invocation}, Invocation.INVOKE_SIGNATURE);
/** Clustering * */
HARMIResponse haResponse = new HARMIResponse();
if (clientViewId != target.getCurrentViewId()) {
haResponse.newReplicants = new ArrayList(target.getReplicants());
haResponse.currentViewId = target.getCurrentViewId();
}
haResponse.response = obj;
/** End Clustering * */
return new MarshalledObject(haResponse);
} catch (Exception e) {
Throwable th = JMXExceptionDecoder.decode(e);
if (log.isTraceEnabled()) {
log.trace("Failed to invoke on mbean: " + mbean, th);
}
if (th instanceof Exception) {
e = (Exception) th;
}
throw e;
} finally {
currentThread.setContextClassLoader(oldCl);
Thread.interrupted(); // clear interruption because this thread may be pooled.
}
}
