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Added tests for expired leases.

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This commit is contained in:
Sachin Sundar P S 2021-10-27 15:47:14 -07:00
parent 6ce02ae181
commit e66493da28
2 changed files with 38 additions and 10 deletions
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11
amazon-kinesis-client/src/main/java/software/amazon/kinesis/leases/dynamodb/DynamoDBLeaseTaker.java
View file

@ -14,6 +14,8 @@
*/
package software.amazon.kinesis.leases.dynamodb;
import com.google.common.annotations.VisibleForTesting;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
@ -40,9 +42,6 @@ import software.amazon.kinesis.metrics.MetricsLevel;
import software.amazon.kinesis.metrics.MetricsScope;
import software.amazon.kinesis.metrics.MetricsUtil;
import static java.util.stream.Collectors.groupingBy;
import static java.util.stream.Collectors.summingInt;
/**
* An implementation of {@link LeaseTaker} that uses DynamoDB via {@link LeaseRefresher}.
*/
@ -63,13 +62,14 @@ public class DynamoDBLeaseTaker implements LeaseTaker {
private final long leaseDurationNanos;
private final MetricsFactory metricsFactory;
private final Map<String, Lease> allLeases = new HashMap<>();
// TODO: Remove these defaults and use the defaults in the config
private int maxLeasesForWorker = Integer.MAX_VALUE;
private int maxLeasesToStealAtOneTime = 1;
private long lastScanTimeNanos = 0L;
final Map<String, Lease> allLeases = new HashMap<>();
public DynamoDBLeaseTaker(LeaseRefresher leaseRefresher, String workerIdentifier, long leaseDurationMillis,
final MetricsFactory metricsFactory) {
this.leaseRefresher = leaseRefresher;
@ -542,7 +542,8 @@ public class DynamoDBLeaseTaker implements LeaseTaker {
* @param expiredLeases list of leases that are currently expired
* @return map of workerIdentifier to lease count
*/
private Map<String, Integer> computeLeaseCounts(List<Lease> expiredLeases) {
@VisibleForTesting
Map<String, Integer> computeLeaseCounts(List<Lease> expiredLeases) {
Map<String, Integer> leaseCounts = new HashMap<>();
// The set will give much faster lookup than the original list, an
// important optimization when the list is large

37
amazon-kinesis-client/src/test/java/software/amazon/kinesis/leases/dynamodb/DynamoDBLeaseTakerTest.java
View file

@ -14,10 +14,12 @@
*/
package software.amazon.kinesis.leases.dynamodb;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
@ -105,10 +107,9 @@ public class DynamoDBLeaseTakerTest {
Assert.assertEquals("foo, bar", DynamoDBLeaseTaker.stringJoin(strings, ", "));
}
@Test
public void test_computeLeaseCounts() throws Exception {
Lease lease = new Lease();
public void test_computeLeaseCounts_noExpiredLease() throws Exception {
final Lease lease = new Lease();
lease.checkpoint(new ExtendedSequenceNumber("checkpoint"));
lease.ownerSwitchesSinceCheckpoint(0L);
lease.leaseCounter(0L);
@ -117,13 +118,39 @@ public class DynamoDBLeaseTakerTest {
lease.childShardIds(new HashSet<>());
lease.leaseKey("1");
final List<Lease> leases = Collections.singletonList(lease);
dynamoDBLeaseTaker.allLeases.put("1", lease);
when(leaseRefresher.listLeases()).thenReturn(leases);
when(metricsFactory.createMetrics()).thenReturn(new NullMetricsScope());
when(timeProvider.call()).thenReturn(1000L);
Map<String, Lease> actualOutput = dynamoDBLeaseTaker.takeLeases(timeProvider);
final Map<String, Integer> actualOutput = dynamoDBLeaseTaker.computeLeaseCounts(ImmutableList.of());
assertEquals(ImmutableMap.of(), actualOutput);
final Map<String, Integer> expectedOutput = new HashMap<>();
expectedOutput.put(null, 1);
expectedOutput.put("foo", 0);
assertEquals(expectedOutput, actualOutput);
}
@Test
public void test_computeLeaseCounts_withExpiredLease() throws Exception {
final Lease lease = new Lease();
lease.checkpoint(new ExtendedSequenceNumber("checkpoint"));
lease.ownerSwitchesSinceCheckpoint(0L);
lease.leaseCounter(0L);
lease.leaseOwner(null);
lease.parentShardIds(Collections.singleton("parentShardId"));
lease.childShardIds(new HashSet<>());
lease.leaseKey("1");
final List<Lease> leases = Collections.singletonList(lease);
dynamoDBLeaseTaker.allLeases.put("1", lease);
when(leaseRefresher.listLeases()).thenReturn(leases);
when(metricsFactory.createMetrics()).thenReturn(new NullMetricsScope());
when(timeProvider.call()).thenReturn(1000L);
final Map<String, Integer> actualOutput = dynamoDBLeaseTaker.computeLeaseCounts(leases);
assertEquals(ImmutableMap.of("foo", 0), actualOutput);
}
}