io.stargate.it.driver.CqlSessionExtension Maven / Gradle / Ivy
package io.stargate.it.driver;
import static org.awaitility.Awaitility.await;
import com.datastax.oss.driver.api.core.CqlIdentifier;
import com.datastax.oss.driver.api.core.CqlSession;
import com.datastax.oss.driver.api.core.CqlSessionBuilder;
import com.datastax.oss.driver.api.core.config.DriverConfigLoader;
import com.datastax.oss.driver.api.core.config.OptionsMap;
import com.datastax.oss.driver.api.core.config.TypedDriverOption;
import com.datastax.oss.driver.internal.core.loadbalancing.DcInferringLoadBalancingPolicy;
import io.stargate.it.storage.StargateEnvironmentInfo;
import io.stargate.it.storage.StargateExtension;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.net.InetSocketAddress;
import java.time.Duration;
import java.util.Date;
import java.util.List;
import java.util.Optional;
import javax.validation.constraints.NotNull;
import org.junit.jupiter.api.TestInstance.Lifecycle;
import org.junit.jupiter.api.extension.AfterAllCallback;
import org.junit.jupiter.api.extension.AfterEachCallback;
import org.junit.jupiter.api.extension.BeforeAllCallback;
import org.junit.jupiter.api.extension.BeforeEachCallback;
import org.junit.jupiter.api.extension.ExtensionContext;
import org.junit.jupiter.api.extension.ParameterContext;
import org.junit.jupiter.api.extension.ParameterResolutionException;
import org.junit.jupiter.api.extension.ParameterResolver;
import org.junit.platform.commons.support.AnnotationSupport;
import org.junit.platform.commons.util.ReflectionUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Manages a Java driver {@link CqlSession} in Junit 5 tests.
*
* Requirements
*
* This extension requires {@link StargateExtension} to be activated as well, and the Stargate
* node(s) must be started first. This can generally be achieved by declaring the annotations in the
* right order. The created session will use all the Stargate nodes as contact points.
*
* Lifecycle
*
* This extension can be declared either at the class level, or at the method level.
*
* Class level
*
*
* @UseStargateCoordinator
* @ExtendWith(CqlSessionExtension.class)
* public class SomeTestClass {
* @Test
* public void test1(CqlSession session) {}
* @Test
* public void test2(CqlSession session) {}
* }
*
*
* In this mode, the extension creates a single session for all test methods. In other words, {@code
* session} in {@code test1} and {@code test2} refer to the same instance. The session is shut down
* once all methods have executed.
*
* Method level
*
*
* @UseStargateCoordinator
* public class SomeTestClass {
* @Test
* @ExtendWith(CqlSessionExtension.class)
* public void test1(CqlSession session) {}
* @Test
* @ExtendWith(CqlSessionExtension.class)
* public void test2(CqlSession session) {}
* }
*
*
* In this mode, the extension creates a separate session before every method, and shuts it down
* immediately after. In other words, {@code session} in {@code test1} and {@code test2} refer to
* different instances.
*
* It's possible to declare the extension on some methods but not others; sessions will be
* created or not, accordingly.
*
*
If the extension is declared both on the class level and on some methods, the method-level
* annotations are ignored. If you need method-level sessions in addition to the global one, it is
* possible to do it manually by injecting a builder (see the "Parameter injection" section below).
*
*
Keyspace creation
*
* By default, the extension creates a dedicated keyspace for the lifecycle of each created session,
* and drops it immediately after the test class/method has executed. Keyspace names are generated
* in a way that guarantees uniqueness, to avoid conflicts between tests.
*
* A {@code USE ks} statement is automatically issued, so that the session is already "connected"
* to the keyspace when your test code starts executing. In general you don't need to prefix table
* names in your queries, and tests are often oblivious to the actual keyspace name. However it can
* be injected if you need it (see the "Parameter injection" section below).
*
*
Customization
*
* Certain aspects of the session creation can be controlled with the {@link CqlSessionSpec}
* annotation. See the javadocs of that type for more details.
*
* Parameter injection
*
* The extension will detect and inject the following parameters on JUnit test methods
* (constructors, BeforeXxx or test methods, etc):
*
*
* - any parameter of type {@link CqlSession}: injected with the session that was created by the
* extension.
*
- any parameter of type {@link CqlSessionBuilder}: injected with a new session builder
* pre-configured to connect to the Stargate cluster. This allows you to create new sessions
* with a different configuration in your test methods. Note that such sessions are not
* managed by the extension: you must close them explicitly once you are done, to avoid
* resource leaks. A try-with-resources block is generally the best way to do that. Also, you
* might want to use {@link CqlSessionHelper#waitForStargateNodes} if there are multiple
* Stargate nodes.
*
- a parameter of type {@link CqlIdentifier} AND annotated with {@link TestKeyspace}:
* injected with the identifier of the keyspace that was created by the extension. This is
* useful if you need to look up schema metadata, use the keyspace from another session or
* API, etc.
*
- any parameter of type {@link CqlSessionHelper}: returns an instance of that interface, that
* contains utility methods (see its javadocs).
*
*
* Parallel execution
*
* JUnit 5 allows parallel execution of test classes, or even parallel execution of test methods
* within the same class. This extension is thread-safe and will work in either scenario. Note
* however that using a class-level extension with parallel methods can be tricky: the methods will
* be accessing the same keyspace concurrently, which can have unintended side effects if they
* mutate the same tables. It's probably a good idea to keep parallelism at the class level.
*/
public class CqlSessionExtension
implements BeforeAllCallback,
BeforeEachCallback,
AfterEachCallback,
AfterAllCallback,
ParameterResolver {
private static final Logger LOG = LoggerFactory.getLogger(CqlSessionExtension.class);
private static final int KEYSPACE_NAME_MAX_LENGTH = 48;
// Tracks whether the extension was configured per-class or per-method.
private volatile Lifecycle sessionLifecycle;
private volatile StargateEnvironmentInfo stargate;
private volatile CqlSessionSpec cqlSessionSpec;
private volatile CqlIdentifier keyspaceId;
private volatile CqlSession session;
private volatile List contactPoints;
@Override
public void beforeAll(ExtensionContext context) {
LOG.debug("Starting per-class execution for {}", context.getElement());
// beforeAll and afterAll are never called if we're per-method, that's how we figure out the
// lifecycle
sessionLifecycle = Lifecycle.PER_CLASS;
createSession(context);
}
@Override
public void beforeEach(ExtensionContext context) {
if (sessionLifecycle == null) {
LOG.debug("Starting per-method execution for {}", context.getElement());
sessionLifecycle = Lifecycle.PER_METHOD;
createSession(context);
}
}
@Override
public void afterEach(ExtensionContext context) {
assert sessionLifecycle != null;
if (sessionLifecycle == Lifecycle.PER_METHOD) {
LOG.debug("Stopping per-method execution for {}", context.getElement());
destroySession(context);
}
}
@Override
public void afterAll(ExtensionContext context) {
LOG.debug("Stopping per-class execution for {}", context.getElement());
destroySession(context);
}
@Override
public boolean supportsParameter(
ParameterContext parameterContext, ExtensionContext extensionContext)
throws ParameterResolutionException {
Parameter parameter = parameterContext.getParameter();
Class type = parameter.getType();
return type == CqlSession.class
|| type == CqlSessionBuilder.class
|| type == CqlSessionHelper.class
|| (type == CqlIdentifier.class && parameter.getAnnotation(TestKeyspace.class) != null);
}
@Override
public Object resolveParameter(
ParameterContext parameterContext, ExtensionContext extensionContext)
throws ParameterResolutionException {
Class type = parameterContext.getParameter().getType();
if (type == CqlSession.class) {
if (session == null) {
throw new IllegalStateException(
String.format(
"Can't inject a session because @%s.createSession() == false",
CqlSessionSpec.class.getSimpleName()));
} else {
return session;
}
} else if (type == CqlSessionBuilder.class) {
return newSessionBuilder(extensionContext);
} else if (type == CqlSessionHelper.class) {
return (CqlSessionHelper) this::waitForStargateNodes;
} else if (type == CqlIdentifier.class) {
if (keyspaceId == null) {
throw new IllegalStateException(
String.format(
"Can't inject the keyspace id because @%s.createKeyspace == false",
CqlSessionSpec.class.getSimpleName()));
} else {
return keyspaceId;
}
} else {
throw new AssertionError("Unsupported parameter");
}
}
private void createSession(ExtensionContext context) {
stargate =
(StargateEnvironmentInfo)
context.getStore(ExtensionContext.Namespace.GLOBAL).get(StargateExtension.STORE_KEY);
if (stargate == null) {
throw new IllegalStateException(
String.format(
"%s can only be used in conjunction with %s (make sure it is declared last)",
CqlSessionExtension.class.getSimpleName(), StargateExtension.class.getSimpleName()));
}
cqlSessionSpec = getCqlSessionSpec(context);
try {
contactPoints =
cqlSessionSpec.contactPointResolver().getConstructor().newInstance().resolve(context);
} catch (Exception e) {
throw new IllegalStateException(
String.format(
"Unable to resolve contact points using @%s.contactPointResolver == %s.class",
CqlSessionSpec.class.getSimpleName(),
cqlSessionSpec.contactPointResolver().getSimpleName()),
e);
}
if (cqlSessionSpec.createSession()) {
LOG.debug("Creating new session for {}", context.getElement());
session = newSessionBuilder(context).build();
waitForStargateNodes(session);
if (cqlSessionSpec.createKeyspace()) {
keyspaceId = generateKeyspaceId(context);
LOG.debug("Creating keyspace {}", keyspaceId.asCql(true));
session.execute(
String.format(
"CREATE KEYSPACE IF NOT EXISTS %s "
+ "WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1}",
keyspaceId.asCql(false)));
session.execute(String.format("USE %s", keyspaceId.asCql(false)));
}
for (String query : cqlSessionSpec.initQueries()) {
session.execute(query);
}
} else {
LOG.debug(
"Not creating session for {} because @{}.createSession() == false",
context.getElement(),
CqlSessionSpec.class.getSimpleName());
}
}
private void destroySession(ExtensionContext context) {
if (session != null) {
try {
if (cqlSessionSpec.dropKeyspace()) {
LOG.debug("Dropping keyspace {}", keyspaceId.asCql(true));
session.execute(String.format("DROP KEYSPACE IF EXISTS %s", keyspaceId.asCql(false)));
}
} finally {
LOG.debug("Destroying session for {}", context.getElement());
session.close();
}
}
}
private CqlSessionSpec getCqlSessionSpec(ExtensionContext context) {
AnnotatedElement element =
context
.getElement()
.orElseThrow(() -> new IllegalStateException("Expected to have an element"));
Optional maybeSpec =
AnnotationSupport.findAnnotation(element, CqlSessionSpec.class);
if (!maybeSpec.isPresent() && element instanceof Method) {
maybeSpec =
AnnotationSupport.findAnnotation(
((Method) element).getDeclaringClass(), CqlSessionSpec.class);
}
return maybeSpec.orElse(DefaultCqlSessionSpec.INSTANCE);
}
private CqlSessionBuilder newSessionBuilder(ExtensionContext context) {
OptionsMap options = defaultConfig();
maybeCustomizeOptions(options, cqlSessionSpec, context);
CqlSessionBuilder builder = CqlSession.builder().withAuthCredentials("cassandra", "cassandra");
builder = maybeCustomizeBuilder(builder, cqlSessionSpec, context);
builder.withConfigLoader(DriverConfigLoader.fromMap(options)).addContactPoints(contactPoints);
return builder;
}
/** @see CqlSessionHelper#waitForStargateNodes(CqlSession) */
private void waitForStargateNodes(CqlSession session) {
int expectedNodeCount = contactPoints.size();
if (expectedNodeCount > 1) {
await()
.atMost(Duration.ofMinutes(10))
.pollInterval(Duration.ofSeconds(10))
.until(
() -> {
boolean connected = session.getMetadata().getNodes().size() == expectedNodeCount;
LOG.debug(
"Expected: {}, in driver metadata: {}, in system tables: {}",
expectedNodeCount,
session.getMetadata().getNodes().size(),
session.execute("SELECT * FROM system.peers").all().size() + 1);
return connected;
});
}
}
private void maybeCustomizeOptions(
OptionsMap options, CqlSessionSpec cqlSessionSpec, ExtensionContext context) {
String methodName = cqlSessionSpec.customOptions().trim();
if (!methodName.isEmpty()) {
Method method =
ReflectionUtils.getRequiredMethod(
context.getRequiredTestClass(), methodName, OptionsMap.class);
Object testInstance = context.getTestInstance().orElse(null);
ReflectionUtils.invokeMethod(method, testInstance, options);
}
}
private CqlSessionBuilder maybeCustomizeBuilder(
CqlSessionBuilder builder, CqlSessionSpec cqlSessionSpec, ExtensionContext context) {
String methodName = cqlSessionSpec.customBuilder().trim();
if (methodName.isEmpty()) {
return builder;
} else {
Method method =
ReflectionUtils.getRequiredMethod(
context.getRequiredTestClass(), methodName, CqlSessionBuilder.class);
if (method.getReturnType() != CqlSessionBuilder.class) {
throw new IllegalArgumentException(
String.format(
"The method referenced by %s.customBuilder() must return %s",
CqlSessionSpec.class.getSimpleName(), CqlSessionBuilder.class.getSimpleName()));
}
Object testInstance = context.getTestInstance().orElse(null);
return (CqlSessionBuilder) ReflectionUtils.invokeMethod(method, testInstance, builder);
}
}
@NotNull
private OptionsMap defaultConfig() {
OptionsMap config;
config = OptionsMap.driverDefaults();
config.put(
TypedDriverOption.LOAD_BALANCING_POLICY_CLASS,
DcInferringLoadBalancingPolicy.class.getName());
config.put(TypedDriverOption.REQUEST_TIMEOUT, Duration.ofMinutes(3));
config.put(TypedDriverOption.METADATA_SCHEMA_REQUEST_TIMEOUT, Duration.ofMinutes(3));
config.put(TypedDriverOption.CONNECTION_INIT_QUERY_TIMEOUT, Duration.ofMinutes(3));
config.put(TypedDriverOption.CONTROL_CONNECTION_TIMEOUT, Duration.ofMinutes(3));
config.put(TypedDriverOption.HEARTBEAT_TIMEOUT, Duration.ofMinutes(1));
config.put(TypedDriverOption.HEARTBEAT_INTERVAL, Duration.ofMinutes(1));
config.put(TypedDriverOption.REQUEST_TRACE_INTERVAL, Duration.ofSeconds(5));
config.put(TypedDriverOption.REQUEST_TRACE_ATTEMPTS, 180 / 5);
config.put(TypedDriverOption.REQUEST_WARN_IF_SET_KEYSPACE, false);
return config;
}
private static CqlIdentifier generateKeyspaceId(ExtensionContext context) {
String targetName =
context
.getTestMethod()
.map(Method::getName)
.orElseGet(
() ->
context
.getTestClass()
.map(Class::getSimpleName)
.orElseThrow(
() ->
new IllegalStateException(
"Could not infer a class or method name")));
String keyspaceName = "ks_" + new Date().getTime() + "_" + targetName;
if (keyspaceName.length() > KEYSPACE_NAME_MAX_LENGTH) {
keyspaceName = keyspaceName.substring(0, KEYSPACE_NAME_MAX_LENGTH);
}
return CqlIdentifier.fromInternal(keyspaceName);
}
@CqlSessionSpec
private static class DefaultCqlSessionSpec {
private static final CqlSessionSpec INSTANCE =
DefaultCqlSessionSpec.class.getAnnotation(CqlSessionSpec.class);
}
}
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