/**
* Removes given value from the set and returns the instance stored in the set or {@code null} if
* value was not found.
*
* @param val Value to remove.
* @return The instance that was stored in the set or {@code null}.
*/
@Nullable
public V removex(V val) {
A.notNull(val, "val");
if (comp == null || !strict) {
for (Iterator<V> it = vals.iterator(); it.hasNext(); ) {
V v = it.next();
if (v.equals(val)) {
it.remove();
return v;
}
}
return null;
}
assert comp != null && strict;
for (Iterator<V> it = vals.iterator(); it.hasNext(); ) {
V v = it.next();
// Prefer equals to comparator.
if (v.equals(val)) {
it.remove();
return v;
}
if (comp.compare(v, val) > 0) break;
}
return null;
}
/**
* Either adds a value to set or does nothing if value is already present.
*
* @param val Value to add.
* @return The instance of value from this set or {@code null} if value was added.
*/
@Nullable
public V addx(V val) {
A.notNull(val, "val");
if (comp == null) {
for (V v : vals) if (v.equals(val)) return v;
vals.add(val);
return null;
}
if (strict) {
for (ListIterator<V> it = vals.listIterator(); it.hasNext(); ) {
V v = it.next();
// Prefer equals to comparator.
if (v.equals(val)) return v;
int c = comp.compare(v, val);
if (c == 0) throw new IllegalStateException("Inconsistent equals and compare methods.");
if (c > 0) {
// Back up.
it.previous();
it.add(val);
return null;
}
}
vals.add(val);
return null;
}
// Full scan first.
for (V v : vals) if (v.equals(val)) return v;
for (ListIterator<V> it = vals.listIterator(); it.hasNext(); ) {
V v = it.next();
if (comp.compare(v, val) > 0) {
do {
// Back up.
v = it.previous();
} while (comp.compare(v, val) == 0);
it.add(val);
return null;
}
}
vals.add(val);
return null;
}
/**
* @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;
}
/**
* Clones this set.
*
* @return Clone of this set.
* @throws CloneNotSupportedException
*/
@SuppressWarnings({"unchecked", "OverriddenMethodCallDuringObjectConstruction"})
@Override
protected Object clone() throws CloneNotSupportedException {
GridListSet<V> clone = (GridListSet<V>) super.clone();
clone.vals = (LinkedList<V>) vals.clone();
clone.comp = comp;
clone.strict = strict;
return clone;
}
/**
* @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);
}
}
}
/** {@inheritDoc} */
@SuppressWarnings({"unchecked"})
@Override
public boolean contains(Object val) {
A.notNull(val, "val");
if (comp != null && strict) {
for (V v : vals) {
// Prefer equals to comparator.
if (v.equals(val)) return true;
if (comp.compare(v, (V) val) > 0) break;
}
return false;
}
return vals.contains(val);
}
/** {@inheritDoc} */
@Override
public int size() {
return vals.size();
}
/** {@inheritDoc} */
@Override
public Iterator<V> iterator() {
return vals.iterator();
}
/**
* Gets value at given index within internal list. Note that this method will iterate through the
* list to get a value at the specified index.
*
* @param idx Index to get value at (must be non-negative and less than {@link #size()}).
* @return Value at give index.
*/
public V get(int idx) {
A.ensure(idx >= 0 && idx < size(), "idx >= 0 && idx < size()");
return vals.get(idx);
}
/**
* Gets last element of this list.
*
* @return Last element or {@code null} if list is empty.
*/
@Nullable
public V last() {
return vals.isEmpty() ? null : vals.getLast();
}
/**
* Gets first element of this list.
*
* @return First element or {@code null} if list is empty.
*/
@Nullable
public V first() {
return vals.isEmpty() ? null : vals.getFirst();
}
/**
* Removes the last element of this list.
*
* @return Removed element or {@code null} if list is empty.
*/
@Nullable
public V removeLast() {
return vals.isEmpty() ? null : vals.removeLast();
}
/**
* @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;
}