| /* |
| * 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.query; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import org.apache.ignite.configuration.SqlConfiguration; |
| import org.jsr166.ConcurrentLinkedDeque8; |
| import org.jsr166.ConcurrentLinkedDeque8.Node; |
| |
| /** |
| * |
| */ |
| class QueryHistoryTracker { |
| /** Query history. */ |
| private final ConcurrentHashMap<QueryHistoryKey, QueryHistory> qryHist; |
| |
| /** Queue. */ |
| private final ConcurrentLinkedDeque8<QueryHistory> evictionQueue = new ConcurrentLinkedDeque8<>(); |
| |
| /** History size. */ |
| private final int histSz; |
| |
| /** |
| * @param histSz History size. |
| */ |
| QueryHistoryTracker(int histSz) { |
| this.histSz = histSz; |
| |
| qryHist = histSz > 0 ? new ConcurrentHashMap<>(histSz) : null; |
| } |
| |
| /** |
| * @param failed {@code True} if query execution failed. |
| */ |
| void collectHistory(GridRunningQueryInfo runningQryInfo, boolean failed) { |
| if (histSz <= 0) |
| return; |
| |
| String qry = runningQryInfo.query(); |
| String schema = runningQryInfo.schemaName(); |
| boolean loc = runningQryInfo.local(); |
| long startTime = runningQryInfo.startTime(); |
| long duration = System.currentTimeMillis() - startTime; |
| |
| QueryHistory hist = new QueryHistory(qry, schema, loc, startTime, duration, failed); |
| |
| QueryHistory mergedHist = qryHist.merge(hist.key(), hist, QueryHistory::aggregateWithNew); |
| |
| if (touch(mergedHist) && qryHist.size() > histSz) |
| shrink(); |
| } |
| |
| /** |
| * @param entry Entry Which was updated |
| * @return {@code true} In case entry is new and has been added, {@code false} otherwise. |
| */ |
| private boolean touch(QueryHistory entry) { |
| Node<QueryHistory> node = entry.link(); |
| |
| // Entry has not been enqueued yet. |
| if (node == null) { |
| node = evictionQueue.offerLastx(entry); |
| |
| if (!entry.replaceLink(null, node)) { |
| // Was concurrently added, need to clear it from queue. |
| removeLink(node); |
| |
| return false; |
| } |
| |
| if (node.item() == null) { |
| // Was concurrently shrinked. |
| entry.replaceLink(node, null); |
| |
| return false; |
| } |
| |
| return true; |
| } |
| else if (removeLink(node)) { |
| // Move node to tail. |
| Node<QueryHistory> newNode = evictionQueue.offerLastx(entry); |
| |
| if (!entry.replaceLink(node, newNode)) { |
| // Was concurrently added, need to clear it from queue. |
| removeLink(newNode); |
| } |
| } |
| |
| // Entry is already in queue. |
| return false; |
| } |
| |
| /** |
| * Tries to remove one item from queue. |
| */ |
| private void shrink() { |
| while (true) { |
| QueryHistory entry = evictionQueue.poll(); |
| |
| if (entry == null) |
| return; |
| |
| // History has been changed if we can't remove history entry. |
| // In this case eviction queue already offered by the entry and we don't put it back. Just try to do new |
| // attempt to remove oldest entry. |
| if (qryHist.remove(entry.key(), entry)) |
| return; |
| } |
| } |
| |
| /** |
| * @param node Node which should be unlinked from eviction queue. |
| * @return {@code true} If node was unlinked. |
| */ |
| private boolean removeLink(Node<QueryHistory> node) { |
| return evictionQueue.unlinkx(node); |
| } |
| |
| /** |
| * Gets SQL query history. Size of history could be configured via |
| * {@link SqlConfiguration#setSqlQueryHistorySize(int)}. |
| * |
| * @return SQL queries history aggregated by query text, schema and local flag. |
| */ |
| Map<QueryHistoryKey, QueryHistory> queryHistory() { |
| if (histSz <= 0) |
| return Collections.emptyMap(); |
| |
| return qryHist; |
| } |
| } |