@Override
public int doStartTag() throws PageException {
// if(timeoutInMillis==0)timeoutInMillis=30000;
// print.out("doStartTag");
manager = pageContext.getConfig().getLockManager();
// check attributes
if (name != null && scope != SCOPE_NONE) {
throw new LockException(
LockException.OPERATION_CREATE,
this.name,
"invalid attribute combination",
"attribute [name] and [scope] can't be used together");
}
if (name == null && scope == SCOPE_NONE) {
name = "id-" + id;
}
String lockType = null;
if (name == null) {
String cid = pageContext.getConfig().getIdentification().getId();
// Session
if (scope == SCOPE_REQUEST) {
lockType = "request";
name = "__request_" + cid + "__" + ((RequestImpl) pageContext.requestScope())._getId();
}
// Session
else if (scope == SCOPE_SESSION) {
lockType = "session";
name = "__session_" + cid + "__" + pageContext.sessionScope()._getId();
}
// Application
else if (scope == SCOPE_APPLICATION) {
lockType = "application";
name =
"__application_"
+ cid
+ "__"
+ ((ApplicationImpl) pageContext.applicationScope())._getId();
}
// Server
else if (scope == SCOPE_SERVER) {
lockType = "server";
name = "__server_" + ((ServerImpl) pageContext.serverScope())._getId();
}
}
Struct cflock = new StructImpl();
cflock.set("succeeded", Boolean.TRUE);
cflock.set("errortext", "");
pageContext.variablesScope().set("cflock", cflock);
start = System.nanoTime();
try {
((PageContextImpl) pageContext)
.setActiveLock(
new ActiveLock(
type,
name,
timeoutInMillis)); // this has to be first, otherwise LockTimeoutException has
// nothing to release
data = manager.lock(type, name, timeoutInMillis, pageContext.getId());
} catch (LockTimeoutException e) {
LockManagerImpl mi = (LockManagerImpl) manager;
Boolean hasReadLock = mi.isReadLocked(name);
Boolean hasWriteLock = mi.isWriteLocked(name);
String msg =
LockTimeoutExceptionImpl.createMessage(
type, name, lockType, timeoutInMillis, hasReadLock, hasWriteLock);
_release(pageContext, System.nanoTime() - start);
name = null;
cflock.set("succeeded", Boolean.FALSE);
cflock.set("errortext", msg);
if (throwontimeout) throw new LockException(LockException.OPERATION_TIMEOUT, this.name, msg);
return SKIP_BODY;
} catch (InterruptedException e) {
_release(pageContext, System.nanoTime() - start);
cflock.set("succeeded", Boolean.FALSE);
cflock.set("errortext", e.getMessage());
if (throwontimeout) throw Caster.toPageException(e);
return SKIP_BODY;
}
return EVAL_BODY_INCLUDE;
}
