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PerProfileRetryPolicyIT.java
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PerProfileRetryPolicyIT.java
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/*
* Copyright DataStax, Inc.
*
* 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 com.datastax.oss.driver.api.core.retry;
import static com.datastax.oss.driver.assertions.Assertions.assertThat;
import static com.datastax.oss.simulacron.common.stubbing.PrimeDsl.noRows;
import static com.datastax.oss.simulacron.common.stubbing.PrimeDsl.unavailable;
import static com.datastax.oss.simulacron.common.stubbing.PrimeDsl.when;
import com.datastax.oss.driver.api.core.ConsistencyLevel;
import com.datastax.oss.driver.api.core.CqlSession;
import com.datastax.oss.driver.api.core.config.DriverConfig;
import com.datastax.oss.driver.api.core.config.DriverConfigProfile;
import com.datastax.oss.driver.api.core.context.DriverContext;
import com.datastax.oss.driver.api.core.cql.ResultSet;
import com.datastax.oss.driver.api.core.cql.SimpleStatement;
import com.datastax.oss.driver.api.core.metadata.Node;
import com.datastax.oss.driver.api.core.servererrors.CoordinatorException;
import com.datastax.oss.driver.api.core.servererrors.UnavailableException;
import com.datastax.oss.driver.api.core.servererrors.WriteType;
import com.datastax.oss.driver.api.core.session.Request;
import com.datastax.oss.driver.api.testinfra.session.SessionRule;
import com.datastax.oss.driver.api.testinfra.simulacron.SimulacronRule;
import com.datastax.oss.driver.categories.ParallelizableTests;
import com.datastax.oss.driver.internal.core.retry.DefaultRetryPolicy;
import com.datastax.oss.simulacron.common.cluster.ClusterSpec;
import java.util.List;
import java.util.Map;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
@Category(ParallelizableTests.class)
public class PerProfileRetryPolicyIT {
// Shared across all tests methods.
public static @ClassRule SimulacronRule simulacron =
new SimulacronRule(ClusterSpec.builder().withNodes(2));
public static @ClassRule SessionRule<CqlSession> sessionRule =
SessionRule.builder(simulacron)
.withOptions(
"load-balancing-policy.class = com.datastax.oss.driver.api.testinfra.loadbalancing.SortingLoadBalancingPolicy",
"request.retry-policy.class = DefaultRetryPolicy",
"profiles.profile1.request.retry-policy.class = \"com.datastax.oss.driver.api.core.retry.PerProfileRetryPolicyIT$NoRetryPolicy\"",
"profiles.profile2 {}")
.build();
private static String QUERY_STRING = "select * from foo";
private static final SimpleStatement QUERY = SimpleStatement.newInstance(QUERY_STRING);
@Before
public void clear() {
simulacron.cluster().clearLogs();
}
@BeforeClass
public static void setup() {
// node 0 will return an unavailable to query.
simulacron
.cluster()
.node(0)
.prime(
when(QUERY_STRING)
.then(
unavailable(
com.datastax.oss.simulacron.common.codec.ConsistencyLevel.ONE, 1, 0)));
// node 1 will return a valid empty rows response.
simulacron.cluster().node(1).prime(when(QUERY_STRING).then(noRows()));
// sanity checks
DriverContext context = sessionRule.session().getContext();
DriverConfig config = context.config();
assertThat(config.getProfiles()).containsKeys("profile1", "profile2");
assertThat(context.retryPolicies())
.hasSize(3)
.containsKeys(DriverConfigProfile.DEFAULT_NAME, "profile1", "profile2");
RetryPolicy defaultPolicy = context.retryPolicy(DriverConfigProfile.DEFAULT_NAME);
RetryPolicy policy1 = context.retryPolicy("profile1");
RetryPolicy policy2 = context.retryPolicy("profile2");
assertThat(defaultPolicy)
.isInstanceOf(DefaultRetryPolicy.class)
.isSameAs(policy2)
.isNotSameAs(policy1);
assertThat(policy1).isInstanceOf(NoRetryPolicy.class);
}
@Test(expected = UnavailableException.class)
public void should_use_policy_from_request_profile() {
// since profile1 uses a NoRetryPolicy, UnavailableException should surface to client.
sessionRule.session().execute(QUERY.setConfigProfileName("profile1"));
}
@Test
public void should_use_policy_from_config_when_not_configured_in_request_profile() {
// since profile2 has no configured retry policy, it should defer to configuration which uses
// DefaultRetryPolicy, which should try request on next host (host 1).
ResultSet result = sessionRule.session().execute(QUERY.setConfigProfileName("profile2"));
// expect an unavailable exception to be present in errors.
List<Map.Entry<Node, Throwable>> errors = result.getExecutionInfo().getErrors();
assertThat(errors).hasSize(1);
assertThat(errors.get(0).getValue()).isInstanceOf(UnavailableException.class);
assertQueryCount(0, 1);
assertQueryCount(1, 1);
}
private void assertQueryCount(int node, int expected) {
assertThat(
simulacron
.cluster()
.node(node)
.getLogs()
.getQueryLogs()
.stream()
.filter(l -> l.getQuery().equals(QUERY_STRING)))
.as("Expected query count to be %d for node %d", expected, node)
.hasSize(expected);
}
// A policy that simply rethrows always.
public static class NoRetryPolicy implements RetryPolicy {
public NoRetryPolicy(DriverContext context, String profileName) {}
@Override
public RetryDecision onReadTimeout(
Request request,
ConsistencyLevel cl,
int blockFor,
int received,
boolean dataPresent,
int retryCount) {
return RetryDecision.RETHROW;
}
@Override
public RetryDecision onWriteTimeout(
Request request,
ConsistencyLevel cl,
WriteType writeType,
int blockFor,
int received,
int retryCount) {
return RetryDecision.RETHROW;
}
@Override
public RetryDecision onUnavailable(
Request request, ConsistencyLevel cl, int required, int alive, int retryCount) {
return RetryDecision.RETHROW;
}
@Override
public RetryDecision onRequestAborted(Request request, Throwable error, int retryCount) {
return RetryDecision.RETHROW;
}
@Override
public RetryDecision onErrorResponse(
Request request, CoordinatorException error, int retryCount) {
return RetryDecision.RETHROW;
}
@Override
public void close() {}
}
}