| /* |
| * 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.cache.transactions; |
| |
| import java.io.Externalizable; |
| import java.io.IOException; |
| import java.io.ObjectInput; |
| import java.io.ObjectOutput; |
| import java.util.AbstractMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.NoSuchElementException; |
| import java.util.Set; |
| import org.apache.ignite.internal.util.GridSerializableIterator; |
| import org.apache.ignite.internal.util.GridSerializableSet; |
| import org.apache.ignite.internal.util.typedef.F; |
| import org.apache.ignite.lang.IgnitePredicate; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Grid cache transaction read or write set. |
| */ |
| public class IgniteTxMap extends AbstractMap<IgniteTxKey, IgniteTxEntry> implements Externalizable { |
| /** */ |
| private static final long serialVersionUID = 0L; |
| |
| /** Base transaction map. */ |
| private Map<IgniteTxKey, IgniteTxEntry> txMap; |
| |
| /** Entry set. */ |
| private Set<Entry<IgniteTxKey, IgniteTxEntry>> entrySet; |
| |
| /** Cached size. */ |
| private int size = -1; |
| |
| /** Empty flag. */ |
| private Boolean empty; |
| |
| /** Sealed flag. */ |
| private boolean sealed; |
| |
| /** Filter. */ |
| private IgnitePredicate<IgniteTxEntry> filter; |
| |
| /** |
| * Empty constructor required for {@link Externalizable}. |
| */ |
| public IgniteTxMap() { |
| // No-op. |
| } |
| |
| /** |
| * @param txMap Transaction map. |
| * @param filter Filter. |
| */ |
| public IgniteTxMap(Map<IgniteTxKey, IgniteTxEntry> txMap, |
| IgnitePredicate<IgniteTxEntry> filter) { |
| this.txMap = txMap; |
| this.filter = filter; |
| } |
| |
| /** |
| * Seals this map. |
| * |
| * @return This map for chaining. |
| */ |
| IgniteTxMap seal() { |
| sealed = true; |
| |
| return this; |
| } |
| |
| /** |
| * @return Sealed flag. |
| */ |
| boolean sealed() { |
| return sealed; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Set<Entry<IgniteTxKey, IgniteTxEntry>> entrySet() { |
| if (entrySet == null) { |
| entrySet = new GridSerializableSet<Entry<IgniteTxKey, IgniteTxEntry>>() { |
| private Set<Entry<IgniteTxKey, IgniteTxEntry>> set = txMap.entrySet(); |
| |
| @Override public Iterator<Entry<IgniteTxKey, IgniteTxEntry>> iterator() { |
| return new GridSerializableIterator<Entry<IgniteTxKey, IgniteTxEntry>>() { |
| private Iterator<Entry<IgniteTxKey, IgniteTxEntry>> it = set.iterator(); |
| |
| private Entry<IgniteTxKey, IgniteTxEntry> cur; |
| |
| // Constructor. |
| { |
| advance(); |
| } |
| |
| @Override public boolean hasNext() { |
| return cur != null; |
| } |
| |
| @Override public Entry<IgniteTxKey, IgniteTxEntry> next() { |
| if (cur == null) |
| throw new NoSuchElementException(); |
| |
| Entry<IgniteTxKey, IgniteTxEntry> e = cur; |
| |
| advance(); |
| |
| return e; |
| } |
| |
| @Override public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| private void advance() { |
| cur = null; |
| |
| while (cur == null && it.hasNext()) { |
| Entry<IgniteTxKey, IgniteTxEntry> e = it.next(); |
| |
| if (filter.apply(e.getValue())) |
| cur = e; |
| } |
| } |
| }; |
| } |
| |
| @Override public int size() { |
| return !sealed ? F.size(iterator()) : size == -1 ? size = F.size(iterator()) : size; |
| } |
| |
| @Override public boolean isEmpty() { |
| return !sealed ? !iterator().hasNext() : empty == null ? empty = !iterator().hasNext() : empty; |
| } |
| }; |
| } |
| |
| return entrySet; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean isEmpty() { |
| return entrySet().isEmpty(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int size() { |
| return entrySet().size(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean containsKey(Object key) { |
| return get(key) != null; |
| } |
| |
| /** {@inheritDoc} */ |
| @Nullable @Override public IgniteTxEntry get(Object key) { |
| IgniteTxEntry e = txMap.get(key); |
| |
| return e == null ? null : filter.apply(e) ? e : null; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public IgniteTxEntry remove(Object key) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void writeExternal(ObjectOutput out) throws IOException { |
| throw new IllegalStateException("Transaction view map should never be serialized: " + this); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { |
| throw new IllegalStateException("Transaction view map should never be serialized: " + this); |
| } |
| } |