| /* |
| * 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.version; |
| |
| import org.apache.ignite.internal.processors.cache.CacheObjectValueContext; |
| import org.apache.ignite.internal.util.tostring.GridToStringExclude; |
| import org.apache.ignite.internal.util.tostring.GridToStringInclude; |
| import org.apache.ignite.internal.util.typedef.internal.CU; |
| import org.apache.ignite.internal.util.typedef.internal.S; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Conflict context implementation. |
| */ |
| public class GridCacheVersionConflictContext<K, V> { |
| /** Old entry. */ |
| @GridToStringInclude |
| private final GridCacheVersionedEntry<K, V> oldEntry; |
| |
| /** New entry. */ |
| @GridToStringInclude |
| private final GridCacheVersionedEntry<K, V> newEntry; |
| |
| /** Object context. */ |
| private final CacheObjectValueContext ctx; |
| |
| /** Current state. */ |
| private State state; |
| |
| /** Current merge value. */ |
| @GridToStringExclude |
| private V mergeVal; |
| |
| /** TTL. */ |
| private long ttl; |
| |
| /** Manual resolve flag. */ |
| private boolean manualResolve; |
| |
| /** |
| * Constructor. |
| * |
| * @param oldEntry Old entry. |
| * @param newEntry New entry. |
| */ |
| public GridCacheVersionConflictContext(CacheObjectValueContext ctx, GridCacheVersionedEntry<K, V> oldEntry, |
| GridCacheVersionedEntry<K, V> newEntry) { |
| assert oldEntry != null && newEntry != null; |
| assert oldEntry.ttl() >= 0 && newEntry.ttl() >= 0; |
| |
| this.oldEntry = oldEntry; |
| this.newEntry = newEntry; |
| this.ctx = ctx; |
| |
| // Set initial state. |
| useNew(); |
| } |
| |
| /** |
| * Gets old (existing) cache entry. |
| * |
| * @return Old (existing) cache entry. |
| */ |
| public GridCacheVersionedEntry<K, V> oldEntry() { |
| return oldEntry; |
| } |
| |
| /** |
| * Gets new cache entry. |
| * |
| * @return New cache entry. |
| */ |
| public GridCacheVersionedEntry<K, V> newEntry() { |
| return newEntry; |
| } |
| |
| /** |
| * Gets cache object context. |
| * |
| * @return Cache object context. |
| */ |
| public CacheObjectValueContext valueContext() { |
| return ctx; |
| } |
| |
| /** |
| * Force cache to ignore new entry and leave old (existing) entry unchanged. |
| */ |
| public void useOld() { |
| state = State.USE_OLD; |
| } |
| |
| /** |
| * Force cache to apply new entry overwriting old (existing) entry. |
| */ |
| public void useNew() { |
| state = State.USE_NEW; |
| |
| ttl = newEntry.ttl(); |
| } |
| |
| /** |
| * Force cache to use neither old, nor new, but some other value passed as argument. In this case old |
| * value will be replaced with merge value and update will be considered as local. |
| * <p> |
| * Also in case of merge you have to specify new TTL explicitly. For unlimited TTL use {@code 0}. |
| * |
| * @param mergeVal Merge value or {@code null} to force remove. |
| * @param ttl Time to live in milliseconds (must be non-negative). |
| */ |
| public void merge(@Nullable V mergeVal, long ttl) { |
| if (ttl < 0) |
| throw new IllegalArgumentException("TTL must be non-negative: " + ttl); |
| |
| state = State.MERGE; |
| |
| this.mergeVal = mergeVal; |
| this.ttl = ttl; |
| } |
| |
| /** |
| * @return {@code True} in case old value should be used. |
| */ |
| public boolean isUseOld() { |
| return state == State.USE_OLD; |
| } |
| |
| /** |
| * @return {@code True} in case new value should be used. |
| */ |
| public boolean isUseNew() { |
| return state == State.USE_NEW; |
| } |
| |
| /** |
| * @return {@code True} in case merge is to be performed. |
| */ |
| public boolean isMerge() { |
| return state == State.MERGE; |
| } |
| |
| /** |
| * Set manual resolve class. |
| */ |
| public void manualResolve() { |
| this.manualResolve = true; |
| } |
| |
| /** |
| * @return Manual resolve flag. |
| */ |
| public boolean isManualResolve() { |
| return manualResolve; |
| } |
| |
| /** |
| * @return Value to merge (if any). |
| */ |
| @Nullable public V mergeValue() { |
| return mergeVal; |
| } |
| |
| /** |
| * @return TTL. |
| */ |
| public long ttl() { |
| return ttl; |
| } |
| |
| /** |
| * @return Expire time. |
| */ |
| public long expireTime() { |
| return isUseNew() ? newEntry.expireTime() : isUseOld() ? oldEntry.expireTime() : CU.toExpireTime(ttl); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return state == State.MERGE ? |
| S.toString(GridCacheVersionConflictContext.class, this, "mergeValue", mergeVal, true) : |
| S.toString(GridCacheVersionConflictContext.class, this); |
| } |
| |
| /** |
| * State. |
| */ |
| private enum State { |
| /** Use old. */ |
| USE_OLD, |
| |
| /** Use new. */ |
| USE_NEW, |
| |
| /** Merge. */ |
| MERGE |
| } |
| } |