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// Copyright 2017 JanusGraph Authors
//
// Licensed 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.janusgraph.diskstorage;
import static org.easymock.EasyMock.capture;
import static org.easymock.EasyMock.expect;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.time.Duration;
import java.util.List;
import java.util.Map;
import org.easymock.Capture;
import org.easymock.CaptureType;
import org.easymock.EasyMock;
import org.easymock.IMocksControl;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import org.janusgraph.diskstorage.configuration.ModifiableConfiguration;
import org.janusgraph.diskstorage.keycolumnvalue.KCVMutation;
import org.janusgraph.diskstorage.keycolumnvalue.KeyColumnValueStore;
import org.janusgraph.diskstorage.keycolumnvalue.KeyColumnValueStoreManager;
import org.janusgraph.diskstorage.keycolumnvalue.KeySliceQuery;
import org.janusgraph.diskstorage.keycolumnvalue.StandardStoreFeatures;
import org.janusgraph.diskstorage.keycolumnvalue.StoreFeatures;
import org.janusgraph.diskstorage.keycolumnvalue.StoreTransaction;
import org.janusgraph.diskstorage.locking.Locker;
import org.janusgraph.diskstorage.locking.LockerProvider;
import org.janusgraph.diskstorage.locking.consistentkey.ExpectedValueCheckingStore;
import org.janusgraph.diskstorage.locking.consistentkey.ExpectedValueCheckingStoreManager;
import org.janusgraph.diskstorage.util.BufferUtil;
import org.janusgraph.diskstorage.util.KeyColumn;
import org.janusgraph.diskstorage.util.StandardBaseTransactionConfig;
import org.janusgraph.diskstorage.util.StaticArrayEntry;
import org.janusgraph.diskstorage.util.StaticArrayEntryList;
import org.janusgraph.diskstorage.util.time.TimestampProviders;
import org.janusgraph.graphdb.configuration.GraphDatabaseConfiguration;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
/**
* Test transaction handling in {@link ExpectedValueCheckingStore} and related
* classes, particularly with respect to consistency levels offered by the
* underlying store.
*/
public class ExpectedValueCheckingTest {
private IMocksControl ctrl;
private ExpectedValueCheckingStoreManager expectManager;
private KeyColumnValueStoreManager backingManager;
private StoreTransaction consistentTx;
private StoreTransaction inconsistentTx;
private StoreTransaction expectTx;
private Locker backingLocker;
private KeyColumnValueStore backingStore;
private KeyColumnValueStore expectStore;
private Capture txConfigCapture;
private static final String STORE_NAME = "ExpectTestStore";
private static final String LOCK_SUFFIX = "_expecttest";
private static final String LOCKER_NAME = STORE_NAME + LOCK_SUFFIX;
private static final StaticBuffer DATA_KEY = BufferUtil.getIntBuffer(1);
private static final StaticBuffer DATA_COL = BufferUtil.getIntBuffer(2);
private static final StaticBuffer DATA_VAL = BufferUtil.getIntBuffer(4);
private static final StaticBuffer LOCK_KEY = BufferUtil.getIntBuffer(32);
private static final StaticBuffer LOCK_COL = BufferUtil.getIntBuffer(64);
private static final StaticBuffer LOCK_VAL = BufferUtil.getIntBuffer(128);
@BeforeEach
public void setupMocks() throws BackendException {
// Initialize mock controller
ctrl = EasyMock.createStrictControl();
ctrl.checkOrder(true);
// Setup some config mocks and objects
backingManager = ctrl.createMock(KeyColumnValueStoreManager.class);
LockerProvider lockerProvider = ctrl.createMock(LockerProvider.class);
ModifiableConfiguration globalConfig = GraphDatabaseConfiguration.buildGraphConfiguration();
ModifiableConfiguration localConfig = GraphDatabaseConfiguration.buildGraphConfiguration();
ModifiableConfiguration defaultConfig = GraphDatabaseConfiguration.buildGraphConfiguration();
// Set some properties on the configs, just so that global/local/default can be easily distinguished
globalConfig.set(GraphDatabaseConfiguration.UNIQUE_INSTANCE_ID, "global");
localConfig.set(GraphDatabaseConfiguration.UNIQUE_INSTANCE_ID, "local");
defaultConfig.set(GraphDatabaseConfiguration.UNIQUE_INSTANCE_ID, "default");
BaseTransactionConfig defaultTxConfig = new StandardBaseTransactionConfig.Builder().customOptions(defaultConfig).timestampProvider(TimestampProviders.MICRO).build();
StoreFeatures backingFeatures = new StandardStoreFeatures.Builder().keyConsistent(globalConfig, localConfig).build();
// Setup behavior specification starts below this line
// 1. Construct manager
// The EVCSManager ctor retrieves the backing store's features and stores it in an instance field
expect(backingManager.getFeatures()).andReturn(backingFeatures).once();
// 2. Begin transaction
// EVCTx begins two transactions on the backingManager: one with globalConfig and one with localConfig
// The capture is used in the @After method to check the config
txConfigCapture = EasyMock.newCapture(CaptureType.ALL);
inconsistentTx = ctrl.createMock(StoreTransaction.class);
consistentTx = ctrl.createMock(StoreTransaction.class);
expect(backingManager.beginTransaction(capture(txConfigCapture))).andReturn(inconsistentTx);
expect(backingManager.beginTransaction(capture(txConfigCapture))).andReturn(consistentTx);
// 3. Open a database
backingLocker = ctrl.createMock(Locker.class);
backingStore = ctrl.createMock(KeyColumnValueStore.class);
expect(backingManager.openDatabase(STORE_NAME)).andReturn(backingStore);
expect(backingStore.getName()).andReturn(STORE_NAME);
expect(lockerProvider.getLocker(LOCKER_NAME)).andReturn(backingLocker);
// Carry out setup behavior against mocks
ctrl.replay();
// 1. Construct manager
expectManager = new ExpectedValueCheckingStoreManager(backingManager, LOCK_SUFFIX, lockerProvider, Duration.ofSeconds(1L));
// 2. Begin transaction
expectTx = expectManager.beginTransaction(defaultTxConfig);
// 3. Open a database
expectStore = expectManager.openDatabase(STORE_NAME);
// Verify behavior and reset the mocks for test methods to use
ctrl.verify();
ctrl.reset();
}
@AfterEach
public void verifyMocks() {
ctrl.verify();
ctrl.reset();
// Check capture created in the @Before method
assertTrue(txConfigCapture.hasCaptured());
List transactionConfigurations = txConfigCapture.getValues();
assertEquals(2, transactionConfigurations.size());
// First backing store transaction should use default tx config
assertEquals("default", transactionConfigurations.get(0).getCustomOption(GraphDatabaseConfiguration.UNIQUE_INSTANCE_ID));
// Second backing store transaction should use global strong consistency config
assertEquals("global", transactionConfigurations.get(1).getCustomOption(GraphDatabaseConfiguration.UNIQUE_INSTANCE_ID));
// The order in which these transactions are opened isn't really significant;
// testing them in order is kind of over-specifying the implementation's behavior.
// Could probably relax the ordering selectively here with some thought, but
// I want to keep order checking on in general for the EasyMock control.
}
@Test
public void testMutateWithLockUsesConsistentTx() throws BackendException {
final ImmutableList adds = ImmutableList.of(StaticArrayEntry.of(DATA_COL, DATA_VAL));
final ImmutableList deletions = ImmutableList.of();
final KeyColumn kc = new KeyColumn(LOCK_KEY, LOCK_COL);
// 1. Acquire a lock
backingLocker.writeLock(kc, consistentTx);
// 2. Run a mutation
// N.B. mutation coordinates do not overlap with the lock, but consistentTx should be used anyway
// 2.1. Check locks & expected values before mutating data
backingLocker.checkLocks(consistentTx);
StaticBuffer nextBuf = BufferUtil.nextBiggerBuffer(kc.getColumn());
KeySliceQuery expectedValueQuery = new KeySliceQuery(kc.getKey(), kc.getColumn(), nextBuf);
expect(backingStore.getSlice(expectedValueQuery, consistentTx)) // expected value read must use strong consistency
.andReturn(StaticArrayEntryList.of(StaticArrayEntry.of(LOCK_COL, LOCK_VAL)));
// 2.2. Mutate data
backingStore.mutate(DATA_KEY, adds, deletions, consistentTx); // writes by txs with locks must use strong consistency
ctrl.replay();
// 1. Lock acquisition
expectStore.acquireLock(LOCK_KEY, LOCK_COL, LOCK_VAL, expectTx);
// 2. Mutate
expectStore.mutate(DATA_KEY, adds, deletions, expectTx);
}
@Test
public void testMutateWithoutLockUsesInconsistentTx() throws BackendException {
// Run a mutation
final ImmutableList adds = ImmutableList.of(StaticArrayEntry.of(DATA_COL, DATA_VAL));
final ImmutableList deletions = ImmutableList.of();
backingStore.mutate(DATA_KEY, adds, deletions, inconsistentTx); // consistency level is unconstrained w/o locks
ctrl.replay();
expectStore.mutate(DATA_KEY, adds, deletions, expectTx);
}
@Test
public void testMutateManyWithLockUsesConsistentTx() throws BackendException {
final ImmutableList adds = ImmutableList.of(StaticArrayEntry.of(DATA_COL, DATA_VAL));
final ImmutableList deletions = ImmutableList.of();
Map> mutations =
ImmutableMap.of(STORE_NAME,
ImmutableMap.of(DATA_KEY, new KCVMutation(adds, deletions)));
final KeyColumn kc = new KeyColumn(LOCK_KEY, LOCK_COL);
// Acquire a lock
backingLocker.writeLock(kc, consistentTx);
// 2. Run mutateMany
// 2.1. Check locks & expected values before mutating data
backingLocker.checkLocks(consistentTx);
StaticBuffer nextBuf = BufferUtil.nextBiggerBuffer(kc.getColumn());
KeySliceQuery expectedValueQuery = new KeySliceQuery(kc.getKey(), kc.getColumn(), nextBuf);
expect(backingStore.getSlice(expectedValueQuery, consistentTx)) // expected value read must use strong consistency
.andReturn(StaticArrayEntryList.of(StaticArrayEntry.of(LOCK_COL, LOCK_VAL)));
// 2.2. Run mutateMany on backing manager to modify data
backingManager.mutateMany(mutations, consistentTx); // writes by txs with locks must use strong consistency
ctrl.replay();
// Lock acquisition
expectStore.acquireLock(LOCK_KEY, LOCK_COL, LOCK_VAL, expectTx);
// Mutate
expectManager.mutateMany(mutations, expectTx);
}
@Test
public void testMutateManyWithoutLockUsesInconsistentTx() throws BackendException {
final ImmutableList adds = ImmutableList.of(StaticArrayEntry.of(DATA_COL, DATA_VAL));
final ImmutableList deletions = ImmutableList.of();
Map> mutations =
ImmutableMap.of(STORE_NAME,
ImmutableMap.of(DATA_KEY, new KCVMutation(adds, deletions)));
// Run mutateMany
backingManager.mutateMany(mutations, inconsistentTx); // consistency level is unconstrained w/o locks
ctrl.replay();
// Run mutateMany
expectManager.mutateMany(mutations, expectTx);
}
}
