/**
* @param alias Class alias.
* @return Deployed class.
*/
@Nullable
private GridDeployment getDeployment(String alias) {
assert Thread.holdsLock(mux);
LinkedList<GridDeployment> deps = cache.get(alias);
if (deps != null) {
assert !deps.isEmpty();
GridDeployment dep = deps.getFirst();
if (!dep.isUndeployed()) {
return dep;
}
}
return null;
}
/**
* @param ldr Class loader to undeploy.
* @param recEvt Whether or not to record the event.
*/
private void undeploy(ClassLoader ldr, boolean recEvt) {
Collection<GridDeployment> doomed = new HashSet<GridDeployment>();
synchronized (mux) {
for (Iterator<LinkedList<GridDeployment>> i1 = cache.values().iterator(); i1.hasNext(); ) {
LinkedList<GridDeployment> deps = i1.next();
for (Iterator<GridDeployment> i2 = deps.iterator(); i2.hasNext(); ) {
GridDeployment dep = i2.next();
if (dep.classLoader() == ldr) {
dep.undeploy();
i2.remove();
doomed.add(dep);
if (log.isInfoEnabled()) {
log.info("Removed undeployed class: " + dep);
}
}
}
if (deps.isEmpty()) {
i1.remove();
}
}
}
for (GridDeployment dep : doomed) {
if (dep.isObsolete()) {
// Resource cleanup.
ctx.resource().onUndeployed(dep);
}
if (recEvt) {
recordUndeploy(dep, true);
}
}
}
/**
* @param depMode Deployment mode.
* @param ldr Class loader to deploy.
* @param cls Class.
* @param alias Class alias.
* @return Deployment.
*/
@SuppressWarnings({"ConstantConditions"})
private GridDeployment deploy(
GridDeploymentMode depMode, ClassLoader ldr, Class<?> cls, String alias) {
assert Thread.holdsLock(mux);
LinkedList<GridDeployment> cachedDeps = null;
GridDeployment dep = null;
// Find existing class loader info.
for (LinkedList<GridDeployment> deps : cache.values()) {
for (GridDeployment d : deps) {
if (d.classLoader() == ldr) {
// Cache class and alias.
d.addDeployedClass(cls, alias);
cachedDeps = deps;
dep = d;
break;
}
}
if (cachedDeps != null) {
break;
}
}
if (cachedDeps != null) {
assert dep != null;
cache.put(alias, cachedDeps);
if (!cls.getName().equals(alias)) {
// Cache by class name as well.
cache.put(cls.getName(), cachedDeps);
}
return dep;
}
GridUuid ldrId = GridUuid.randomUuid();
long seqNum = seq.incrementAndGet();
String userVer = getUserVersion(ldr);
dep = new GridDeployment(depMode, ldr, ldrId, seqNum, userVer, cls.getName(), true);
dep.addDeployedClass(cls, alias);
LinkedList<GridDeployment> deps =
F.addIfAbsent(cache, alias, F.<GridDeployment>newLinkedList());
if (!deps.isEmpty()) {
for (GridDeployment d : deps) {
if (!d.isUndeployed()) {
U.error(
log,
"Found more than one active deployment for the same resource "
+ "[cls="
+ cls
+ ", depMode="
+ depMode
+ ", dep="
+ d
+ ']');
return null;
}
}
}
// Add at the beginning of the list for future fast access.
deps.addFirst(dep);
if (!cls.getName().equals(alias)) {
// Cache by class name as well.
cache.put(cls.getName(), deps);
}
if (log.isDebugEnabled()) {
log.debug("Created new deployment: " + dep);
}
return dep;
}