/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.ignite.internal.processors.datastructures;
import java.io.Externalizable;
import java.io.IOException;
import java.io.InvalidObjectException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.ObjectStreamException;
import java.util.concurrent.Callable;
import javax.cache.processor.EntryProcessorException;
import javax.cache.processor.EntryProcessorResult;
import javax.cache.processor.MutableEntry;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.IgniteException;
import org.apache.ignite.cache.CacheEntryProcessor;
import org.apache.ignite.internal.GridKernalContext;
import org.apache.ignite.internal.processors.cache.GridCacheContext;
import org.apache.ignite.internal.processors.cache.IgniteInternalCache;
import org.apache.ignite.internal.processors.cache.distributed.near.GridNearTxLocal;
import org.apache.ignite.internal.processors.cluster.IgniteChangeGlobalStateSupport;
import org.apache.ignite.internal.util.typedef.F;
import org.apache.ignite.internal.util.typedef.internal.CU;
import org.apache.ignite.internal.util.typedef.internal.S;
import org.apache.ignite.internal.util.typedef.internal.U;
import org.apache.ignite.lang.IgniteBiTuple;
import static org.apache.ignite.transactions.TransactionConcurrency.PESSIMISTIC;
import static org.apache.ignite.transactions.TransactionIsolation.REPEATABLE_READ;
/**
* Cache atomic reference implementation.
*/
public final class GridCacheAtomicReferenceImpl<T> implements GridCacheAtomicReferenceEx<T>,
IgniteChangeGlobalStateSupport, Externalizable {
/** */
private static final long serialVersionUID = 0L;
/** Deserialization stash. */
private static final ThreadLocal<IgniteBiTuple<GridKernalContext, String>> stash =
new ThreadLocal<IgniteBiTuple<GridKernalContext, String>>() {
@Override protected IgniteBiTuple<GridKernalContext, String> initialValue() {
return new IgniteBiTuple<>();
}
};
/** Atomic reference name. */
private String name;
/** Status.*/
private volatile boolean rmvd;
/** Check removed flag. */
private boolean rmvCheck;
/** Atomic reference key. */
private GridCacheInternalKey key;
/** Atomic reference projection. */
private IgniteInternalCache<GridCacheInternalKey, GridCacheAtomicReferenceValue<T>> atomicView;
/** Cache context. */
private GridCacheContext ctx;
/**
* Empty constructor required by {@link Externalizable}.
*/
public GridCacheAtomicReferenceImpl() {
// No-op.
}
/**
* Default constructor.
*
* @param name Atomic reference name.
* @param key Atomic reference key.
* @param atomicView Atomic projection.
* @param ctx Cache context.
*/
public GridCacheAtomicReferenceImpl(String name,
GridCacheInternalKey key,
IgniteInternalCache<GridCacheInternalKey, GridCacheAtomicReferenceValue<T>> atomicView,
GridCacheContext ctx) {
assert key != null;
assert atomicView != null;
assert ctx != null;
assert name != null;
this.ctx = ctx;
this.key = key;
this.atomicView = atomicView;
this.name = name;
}
/** {@inheritDoc} */
@Override public String name() {
return name;
}
/** {@inheritDoc} */
@Override public T get() {
checkRemoved();
try {
GridCacheAtomicReferenceValue<T> ref = atomicView.get(key);
if (ref == null)
throw new IgniteCheckedException("Failed to find atomic reference with given name: " + name);
return ref.get();
}
catch (IgniteCheckedException e) {
throw U.convertException(e);
}
}
/** {@inheritDoc} */
@Override public void set(final T val) {
checkRemoved();
try {
if (ctx.dataStructures().knownType(val))
atomicView.invoke(key, new ReferenceSetEntryProcessor<>(val));
else {
CU.retryTopologySafe(new Callable<Void>() {
@Override public Void call() throws Exception {
try (GridNearTxLocal tx = CU.txStartInternal(ctx, atomicView, PESSIMISTIC, REPEATABLE_READ)) {
GridCacheAtomicReferenceValue<T> ref = atomicView.get(key);
if (ref == null)
throw new IgniteException("Failed to find atomic reference with given name: " + name);
atomicView.put(key, new GridCacheAtomicReferenceValue<>(val));
tx.commit();
}
return null;
}
});
}
}
catch (EntryProcessorException e) {
throw new IgniteException(e.getMessage(), e);
}
catch (IgniteCheckedException e) {
throw U.convertException(e);
}
}
/** {@inheritDoc} */
@Override public boolean compareAndSet(final T expVal, final T newVal) {
checkRemoved();
try {
if (ctx.dataStructures().knownType(expVal) && ctx.dataStructures().knownType(newVal)) {
EntryProcessorResult<Boolean> res =
atomicView.invoke(key, new ReferenceCompareAndSetEntryProcessor<>(expVal, newVal));
assert res != null && res.get() != null : res;
return res.get();
}
else {
return CU.retryTopologySafe(new Callable<Boolean>() {
@Override public Boolean call() throws Exception {
try (GridNearTxLocal tx = CU.txStartInternal(ctx, atomicView, PESSIMISTIC, REPEATABLE_READ)) {
GridCacheAtomicReferenceValue<T> ref = atomicView.get(key);
if (ref == null)
throw new IgniteException("Failed to find atomic reference with given name: " + name);
T curVal = ref.get();
if (!F.eq(expVal, curVal))
return false;
else {
atomicView.put(key, new GridCacheAtomicReferenceValue<>(newVal));
tx.commit();
return true;
}
}
}
});
}
}
catch (EntryProcessorException e) {
throw new IgniteException(e.getMessage(), e);
}
catch (IgniteCheckedException e) {
throw U.convertException(e);
}
}
/**
* Compares current value with specified value for equality and, if they are equal, replaces current value.
*
* @param newVal New value to set.
* @param expVal Expected value.
* @return Original value.
*/
public T compareAndSetAndGet(final T newVal, final T expVal) {
checkRemoved();
try {
if (ctx.dataStructures().knownType(expVal) && ctx.dataStructures().knownType(newVal)) {
EntryProcessorResult<T> res =
atomicView.invoke(key, new ReferenceCompareAndSetAndGetEntryProcessor<T>(expVal, newVal));
assert res != null;
return res.get();
}
else {
return CU.retryTopologySafe(new Callable<T>() {
@Override public T call() throws Exception {
try (GridNearTxLocal tx = CU.txStartInternal(ctx, atomicView, PESSIMISTIC, REPEATABLE_READ)) {
GridCacheAtomicReferenceValue<T> ref = atomicView.get(key);
if (ref == null)
throw new IgniteException("Failed to find atomic reference with given name: " + name);
T curVal = ref.get();
if (!F.eq(expVal, curVal))
return curVal;
else {
atomicView.put(key, new GridCacheAtomicReferenceValue<>(newVal));
tx.commit();
return expVal;
}
}
}
});
}
}
catch (EntryProcessorException e) {
throw new IgniteException(e.getMessage(), e);
}
catch (IgniteCheckedException e) {
throw U.convertException(e);
}
}
/** {@inheritDoc} */
@Override public boolean onRemoved() {
return rmvd = true;
}
/** {@inheritDoc} */
@Override public void needCheckNotRemoved() {
rmvCheck = true;
}
/** {@inheritDoc} */
@Override public GridCacheInternalKey key() {
return key;
}
/** {@inheritDoc} */
@Override public boolean removed() {
return rmvd;
}
/** {@inheritDoc} */
@Override public void close() {
if (rmvd)
return;
try {
ctx.kernalContext().dataStructures().removeAtomicReference(name);
}
catch (IgniteCheckedException e) {
throw U.convertException(e);
}
}
/** {@inheritDoc} */
@Override public void onActivate(GridKernalContext kctx) throws IgniteCheckedException {
this.atomicView = kctx.cache().atomicsCache();
this.ctx = atomicView.context();
}
/** {@inheritDoc} */
@Override public void onDeActivate(GridKernalContext kctx) throws IgniteCheckedException {
// No-op.
}
/**
* Check removed status.
*
* @throws IllegalStateException If removed.
*/
private void checkRemoved() throws IllegalStateException {
if (rmvd)
throw removedError();
if (rmvCheck) {
try {
rmvd = atomicView.get(key) == null;
}
catch (IgniteCheckedException e) {
throw U.convertException(e);
}
rmvCheck = false;
if (rmvd) {
ctx.kernalContext().dataStructures().onRemoved(key, this);
throw removedError();
}
}
}
/**
* @return Error.
*/
private IllegalStateException removedError() {
return new IllegalStateException("Atomic reference was removed from cache: " + name);
}
/** {@inheritDoc} */
@Override public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject(ctx.kernalContext());
out.writeUTF(name);
}
/** {@inheritDoc} */
@Override public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
IgniteBiTuple<GridKernalContext, String> t = stash.get();
t.set1((GridKernalContext)in.readObject());
t.set2(in.readUTF());
}
/**
* Reconstructs object on unmarshalling.
*
* @return Reconstructed object.
* @throws ObjectStreamException Thrown in case of unmarshalling error.
*/
@SuppressWarnings("unchecked")
private Object readResolve() throws ObjectStreamException {
try {
IgniteBiTuple<GridKernalContext, String> t = stash.get();
return t.get1().dataStructures().atomicReference(t.get2(), null, false);
}
catch (IgniteCheckedException e) {
throw U.withCause(new InvalidObjectException(e.getMessage()), e);
}
finally {
stash.remove();
}
}
/**
*
*/
static class ReferenceSetEntryProcessor<T> implements
CacheEntryProcessor<GridCacheInternalKey, GridCacheAtomicReferenceValue<T>, Void> {
/** */
private static final long serialVersionUID = 0L;
/** */
private final T newVal;
/**
* @param newVal New value.
*/
ReferenceSetEntryProcessor(T newVal) {
this.newVal = newVal;
}
/** {@inheritDoc} */
@Override public Void process(MutableEntry<GridCacheInternalKey, GridCacheAtomicReferenceValue<T>> e,
Object... args) {
GridCacheAtomicReferenceValue val = e.getValue();
if (val == null)
throw new EntryProcessorException("Failed to find atomic reference with given name: " + e.getKey().name());
e.setValue(new GridCacheAtomicReferenceValue<>(newVal));
return null;
}
/** {@inheritDoc} */
@Override public String toString() {
return S.toString(ReferenceSetEntryProcessor.class, this);
}
}
/**
*
*/
static class ReferenceCompareAndSetEntryProcessor<T> implements
CacheEntryProcessor<GridCacheInternalKey, GridCacheAtomicReferenceValue<T>, Boolean> {
/** */
private static final long serialVersionUID = 0L;
/** */
private final T expVal;
/** */
private final T newVal;
/**
* @param expVal Expected value.
* @param newVal New value.
*/
ReferenceCompareAndSetEntryProcessor(T expVal, T newVal) {
this.expVal = expVal;
this.newVal = newVal;
}
/** {@inheritDoc} */
@Override public Boolean process(MutableEntry<GridCacheInternalKey, GridCacheAtomicReferenceValue<T>> e,
Object... args) {
GridCacheAtomicReferenceValue<T> val = e.getValue();
if (val == null)
throw new EntryProcessorException("Failed to find atomic reference with given name: " + e.getKey().name());
T curVal = val.get();
if (F.eq(expVal, curVal)) {
e.setValue(new GridCacheAtomicReferenceValue<T>(newVal));
return true;
}
return false;
}
/** {@inheritDoc} */
@Override public String toString() {
return S.toString(ReferenceCompareAndSetEntryProcessor.class, this);
}
}
/**
*
*/
static class ReferenceCompareAndSetAndGetEntryProcessor<T> implements
CacheEntryProcessor<GridCacheInternalKey, GridCacheAtomicReferenceValue<T>, T> {
/** */
private static final long serialVersionUID = 0L;
/** */
private final T expVal;
/** */
private final T newVal;
/**
* @param expVal Expected value.
* @param newVal New value.
*/
ReferenceCompareAndSetAndGetEntryProcessor(T expVal, T newVal) {
this.expVal = expVal;
this.newVal = newVal;
}
/** {@inheritDoc} */
@Override public T process(MutableEntry<GridCacheInternalKey, GridCacheAtomicReferenceValue<T>> e,
Object... args) {
GridCacheAtomicReferenceValue<T> val = e.getValue();
if (val == null)
throw new EntryProcessorException("Failed to find atomic reference with given name: " + e.getKey().name());
T curVal = val.get();
if (F.eq(expVal, curVal))
e.setValue(new GridCacheAtomicReferenceValue<T>(newVal));
return curVal;
}
/** {@inheritDoc} */
@Override public String toString() {
return S.toString(ReferenceCompareAndSetAndGetEntryProcessor.class, this);
}
}
/** {@inheritDoc} */
@Override public String toString() {
return S.toString(GridCacheAtomicReferenceImpl.class, this);
}
}