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);
}
}
}
