Merge pull request #31238 from ittays

* pr/31238:
  Polish 'Allow spring.data.cassandra.config file to override default values'
  Allow spring.data.cassandra.config file to override default values

Closes gh-31238

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/cassandra/CassandraAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@
 import java.io.IOException;
 import java.security.NoSuchAlgorithmException;
 import java.time.Duration;
+import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -63,13 +64,23 @@
  * @author Eddú Meléndez
  * @author Stephane Nicoll
  * @author Steffen F. Qvistgaard
+ * @author Ittay Stern
  * @since 1.3.0
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnClass({ CqlSession.class })
 @EnableConfigurationProperties(CassandraProperties.class)
 public class CassandraAutoConfiguration {
 
+	private static final Config SPRING_BOOT_DEFAULTS;
+	static {
+		CassandraDriverOptions options = new CassandraDriverOptions();
+		options.add(DefaultDriverOption.CONTACT_POINTS, Collections.singletonList("127.0.0.1:9042"));
+		options.add(DefaultDriverOption.PROTOCOL_COMPRESSION, "none");
+		options.add(DefaultDriverOption.CONTROL_CONNECTION_TIMEOUT, (int) Duration.ofSeconds(5).toMillis());
+		SPRING_BOOT_DEFAULTS = options.build();
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
 	@Lazy
@@ -118,44 +129,43 @@ public DriverConfigLoader cassandraDriverConfigLoader(CassandraProperties proper
 	}
 
 	private Config cassandraConfiguration(CassandraProperties properties) {
-		Config config = mapConfig(properties);
-		Resource configFile = properties.getConfig();
-		return (configFile != null) ? applyDefaultFallback(config.withFallback(loadConfig(configFile)))
-				: applyDefaultFallback(config);
-	}
-
-	private Config applyDefaultFallback(Config config) {
 		ConfigFactory.invalidateCaches();
-		return ConfigFactory.defaultOverrides().withFallback(config).withFallback(ConfigFactory.defaultReference())
-				.resolve();
+		Config config = ConfigFactory.defaultOverrides();
+		config = config.withFallback(mapConfig(properties));
+		if (properties.getConfig() != null) {
+			config = config.withFallback(loadConfig(properties.getConfig()));
+		}
+		config = config.withFallback(SPRING_BOOT_DEFAULTS);
+		config = config.withFallback(ConfigFactory.defaultReference());
+		return config.resolve();
 	}
 
-	private Config loadConfig(Resource config) {
+	private Config loadConfig(Resource resource) {
 		try {
-			return ConfigFactory.parseURL(config.getURL());
+			return ConfigFactory.parseURL(resource.getURL());
 		}
 		catch (IOException ex) {
-			throw new IllegalStateException("Failed to load cassandra configuration from " + config, ex);
+			throw new IllegalStateException("Failed to load cassandra configuration from " + resource, ex);
 		}
 	}
 
 	private Config mapConfig(CassandraProperties properties) {
 		CassandraDriverOptions options = new CassandraDriverOptions();
-		PropertyMapper map = PropertyMapper.get();
+		PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
 		map.from(properties.getSessionName()).whenHasText()
 				.to((sessionName) -> options.add(DefaultDriverOption.SESSION_NAME, sessionName));
-		map.from(properties::getUsername).whenNonNull()
+		map.from(properties::getUsername)
 				.to((username) -> options.add(DefaultDriverOption.AUTH_PROVIDER_USER_NAME, username)
 						.add(DefaultDriverOption.AUTH_PROVIDER_PASSWORD, properties.getPassword()));
-		map.from(properties::getCompression).whenNonNull()
+		map.from(properties::getCompression)
 				.to((compression) -> options.add(DefaultDriverOption.PROTOCOL_COMPRESSION, compression));
 		mapConnectionOptions(properties, options);
 		mapPoolingOptions(properties, options);
 		mapRequestOptions(properties, options);
 		mapControlConnectionOptions(properties, options);
 		map.from(mapContactPoints(properties))
 				.to((contactPoints) -> options.add(DefaultDriverOption.CONTACT_POINTS, contactPoints));
-		map.from(properties.getLocalDatacenter()).to(
+		map.from(properties.getLocalDatacenter()).whenHasText().to(
 				(localDatacenter) -> options.add(DefaultDriverOption.LOAD_BALANCING_LOCAL_DATACENTER, localDatacenter));
 		return options.build();
 	}
@@ -210,8 +220,12 @@ private void mapControlConnectionOptions(CassandraProperties properties, Cassand
 	}
 
 	private List<String> mapContactPoints(CassandraProperties properties) {
-		return properties.getContactPoints().stream()
-				.map((candidate) -> formatContactPoint(candidate, properties.getPort())).collect(Collectors.toList());
+		if (properties.getContactPoints() != null) {
+			return properties.getContactPoints().stream()
+					.map((candidate) -> formatContactPoint(candidate, properties.getPort()))
+					.collect(Collectors.toList());
+		}
+		return null;
 	}
 
 	private String formatContactPoint(String candidate, int port) {

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/cassandra/CassandraProperties.java

@@ -17,8 +17,6 @@
 package org.springframework.boot.autoconfigure.cassandra;
 
 import java.time.Duration;
-import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 
 import com.datastax.oss.driver.api.core.DefaultConsistencyLevel;
@@ -57,7 +55,7 @@ public class CassandraProperties {
 	 * Cluster node addresses in the form 'host:port', or a simple 'host' to use the
 	 * configured port.
 	 */
-	private final List<String> contactPoints = new ArrayList<>(Collections.singleton("127.0.0.1:9042"));
+	private List<String> contactPoints;
 
 	/**
 	 * Port to use if a contact point does not specify one.
@@ -83,7 +81,7 @@ public class CassandraProperties {
 	/**
 	 * Compression supported by the Cassandra binary protocol.
 	 */
-	private Compression compression = Compression.NONE;
+	private Compression compression;
 
 	/**
 	 * Schema action to take at startup.
@@ -143,6 +141,10 @@ public List<String> getContactPoints() {
 		return this.contactPoints;
 	}
 
+	public void setContactPoints(List<String> contactPoints) {
+		this.contactPoints = contactPoints;
+	}
+
 	public int getPort() {
 		return this.port;
 	}
@@ -266,7 +268,7 @@ public static class Request {
 		/**
 		 * How many rows will be retrieved simultaneously in a single network round-trip.
 		 */
-		private int pageSize;
+		private Integer pageSize;
 
 		private final Throttler throttler = new Throttler();
 
@@ -294,7 +296,7 @@ public void setSerialConsistency(DefaultConsistencyLevel serialConsistency) {
 			this.serialConsistency = serialConsistency;
 		}
 
-		public int getPageSize() {
+		public Integer getPageSize() {
 			return this.pageSize;
 		}
 
@@ -347,7 +349,7 @@ public static class Controlconnection {
 		/**
 		 * Timeout to use for control queries.
 		 */
-		private Duration timeout = Duration.ofSeconds(5);
+		private Duration timeout;
 
 		public Duration getTimeout() {
 			return this.timeout;
@@ -370,17 +372,17 @@ public static class Throttler {
 		 * Maximum number of requests that can be enqueued when the throttling threshold
 		 * is exceeded.
 		 */
-		private int maxQueueSize;
+		private Integer maxQueueSize;
 
 		/**
 		 * Maximum number of requests that are allowed to execute in parallel.
 		 */
-		private int maxConcurrentRequests;
+		private Integer maxConcurrentRequests;
 
 		/**
 		 * Maximum allowed request rate.
 		 */
-		private int maxRequestsPerSecond;
+		private Integer maxRequestsPerSecond;
 
 		/**
 		 * How often the throttler attempts to dequeue requests. Set this high enough that
@@ -397,23 +399,23 @@ public void setType(ThrottlerType type) {
 			this.type = type;
 		}
 
-		public int getMaxQueueSize() {
+		public Integer getMaxQueueSize() {
 			return this.maxQueueSize;
 		}
 
 		public void setMaxQueueSize(int maxQueueSize) {
 			this.maxQueueSize = maxQueueSize;
 		}
 
-		public int getMaxConcurrentRequests() {
+		public Integer getMaxConcurrentRequests() {
 			return this.maxConcurrentRequests;
 		}
 
 		public void setMaxConcurrentRequests(int maxConcurrentRequests) {
 			this.maxConcurrentRequests = maxConcurrentRequests;
 		}
 
-		public int getMaxRequestsPerSecond() {
+		public Integer getMaxRequestsPerSecond() {
 			return this.maxRequestsPerSecond;
 		}
 

spring-boot-project/spring-boot-autoconfigure/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -492,6 +492,10 @@
       "name": "spring.data.cassandra.connection.init-query-timeout",
       "defaultValue": "5s"
     },
+    {
+      "name": "spring.data.cassandra.controlconnection.timeout",
+      "defaultValue": "5s"
+    },
     {
       "name": "spring.data.cassandra.contact-points",
       "defaultValue": [

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/cassandra/CassandraAutoConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.springframework.boot.autoconfigure.cassandra;
 
 import java.time.Duration;
+import java.util.Collections;
 
 import com.datastax.oss.driver.api.core.CqlIdentifier;
 import com.datastax.oss.driver.api.core.CqlSession;
@@ -43,6 +44,7 @@
  *
  * @author Eddú Meléndez
  * @author Stephane Nicoll
+ * @author Ittay Stern
  */
 class CassandraAutoConfigurationTests {
 
@@ -244,6 +246,28 @@ void driverConfigLoaderWithConfigComplementSettings() {
 				});
 	}
 
+	@Test // gh-31238
+	void driverConfigLoaderWithConfigOverridesDefaults() {
+		String configLocation = "org/springframework/boot/autoconfigure/cassandra/override-defaults.conf";
+		this.contextRunner.withPropertyValues("spring.data.cassandra.config=" + configLocation).run((context) -> {
+			DriverExecutionProfile actual = context.getBean(DriverConfigLoader.class).getInitialConfig()
+					.getDefaultProfile();
+			assertThat(actual.getString(DefaultDriverOption.SESSION_NAME)).isEqualTo("advanced session");
+			assertThat(actual.getDuration(DefaultDriverOption.REQUEST_TIMEOUT)).isEqualTo(Duration.ofSeconds(2));
+			assertThat(actual.getStringList(DefaultDriverOption.CONTACT_POINTS))
+					.isEqualTo(Collections.singletonList("1.2.3.4:5678"));
+			assertThat(actual.getBoolean(DefaultDriverOption.RESOLVE_CONTACT_POINTS)).isFalse();
+			assertThat(actual.getInt(DefaultDriverOption.REQUEST_PAGE_SIZE)).isEqualTo(11);
+			assertThat(actual.getString(DefaultDriverOption.LOAD_BALANCING_LOCAL_DATACENTER)).isEqualTo("datacenter1");
+			assertThat(actual.getInt(DefaultDriverOption.REQUEST_THROTTLER_MAX_CONCURRENT_REQUESTS)).isEqualTo(22);
+			assertThat(actual.getInt(DefaultDriverOption.REQUEST_THROTTLER_MAX_REQUESTS_PER_SECOND)).isEqualTo(33);
+			assertThat(actual.getInt(DefaultDriverOption.REQUEST_THROTTLER_MAX_QUEUE_SIZE)).isEqualTo(44);
+			assertThat(actual.getDuration(DefaultDriverOption.CONTROL_CONNECTION_TIMEOUT))
+					.isEqualTo(Duration.ofMillis(5555));
+			assertThat(actual.getString(DefaultDriverOption.PROTOCOL_COMPRESSION)).isEqualTo("SNAPPY");
+		});
+	}
+
 	@Test
 	void driverConfigLoaderWithConfigCreateProfiles() {
 		String configLocation = "org/springframework/boot/autoconfigure/cassandra/profiles.conf";

spring-boot-project/spring-boot-autoconfigure/src/test/resources/org/springframework/boot/autoconfigure/cassandra/override-defaults.conf

@@ -0,0 +1,20 @@
+datastax-java-driver {
+	basic {
+		session-name = advanced session
+		load-balancing-policy {
+			local-datacenter = datacenter1
+		}
+		request.page-size = 11
+		contact-points = [ "1.2.3.4:5678" ]
+	}
+	advanced {
+		throttler {
+			max-concurrent-requests = 22
+			max-requests-per-second = 33
+			max-queue-size = 44
+		}
+		control-connection.timeout = 5555
+		protocol.compression = SNAPPY
+		resolve-contact-points = false
+	}
+}