/* * Copyright (C) 2012, 2016 higherfrequencytrading.com * Copyright (C) 2016 Roman Leventov * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package net.openhft.chronicle.map.fromdocs; import net.openhft.chronicle.core.values.LongValue; import net.openhft.chronicle.hash.ChecksumEntry; import net.openhft.chronicle.map.ChronicleMap; import net.openhft.chronicle.map.ExternalMapQueryContext; import net.openhft.chronicle.map.MapEntry; import net.openhft.chronicle.set.Builder; import net.openhft.chronicle.values.Values; import org.junit.Assert; import org.junit.Test; import java.io.File; import java.io.IOException; public class ChecksumEntryTest { @Test public void testChecksumEntriesWithValueInterface() throws IOException { File file = Builder.getPersistenceFile(); try (ChronicleMap<Integer, LongValue> map = ChronicleMap .of(Integer.class, LongValue.class) .entries(1) // Entry checksums make sense only for persisted Chronicle Maps, and are ON by // default for such maps .createPersistedTo(file)) { LongValue value = Values.newHeapInstance(LongValue.class); value.setValue(42); map.put(1, value); try (ExternalMapQueryContext<Integer, LongValue, ?> c = map.queryContext(1)) { // Update lock required for calling ChecksumEntry.checkSum() c.updateLock().lock(); MapEntry<Integer, LongValue> entry = c.entry(); Assert.assertNotNull(entry); ChecksumEntry checksumEntry = (ChecksumEntry) entry; Assert.assertTrue(checksumEntry.checkSum()); // to access off-heap bytes, should call value().getUsing() with Native value // provided. Simple get() return Heap value by default LongValue nativeValue = entry.value().getUsing(Values.newNativeReference(LongValue.class)); // This value bytes update bypass Chronicle Map internals, so checksum is not // updated automatically nativeValue.setValue(43); Assert.assertFalse(checksumEntry.checkSum()); // Restore correct checksum checksumEntry.updateChecksum(); Assert.assertTrue(checksumEntry.checkSum()); } } } }