Add spring.session.cleanup.cron.expression

Fixes gh-616

spring-session/src/main/java/org/springframework/session/data/redis/RedisOperationsSessionRepository.java

@@ -393,7 +393,7 @@ public class RedisOperationsSessionRepository implements
 		}
 	}
 
-	@Scheduled(cron = "0 * * * * *")
+	@Scheduled(cron = "${spring.session.cleanup.cron.expression:0 * * * * *}")
 	public void cleanupExpiredSessions() {
 		this.expirationPolicy.cleanExpiredSessions();
 	}

spring-session/src/main/java/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfiguration.java

@@ -27,6 +27,7 @@ import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.ImportAware;
+import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
 import org.springframework.core.annotation.AnnotationAttributes;
 import org.springframework.core.type.AnnotationMetadata;
 import org.springframework.data.redis.connection.RedisConnection;
@@ -200,6 +201,15 @@ public class RedisHttpSessionConfiguration extends SpringHttpSessionConfiguratio
 		this.redisSubscriptionExecutor = redisSubscriptionExecutor;
 	}
 
+	/**
+	 * Property placeholder to process the @Scheduled annotation.
+	 * @return the {@link PropertySourcesPlaceholderConfigurer} to use
+	 */
+	@Bean
+	public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
+		return new PropertySourcesPlaceholderConfigurer();
+	}
+
 	/**
 	 * Ensures that Redis is configured to send keyspace notifications. This is important
 	 * to ensure that expiration and deletion of sessions trigger SessionDestroyedEvents.

spring-session/src/main/java/org/springframework/session/jdbc/JdbcOperationsSessionRepository.java

@@ -561,7 +561,7 @@ public class JdbcOperationsSessionRepository implements
 		return sessionMap;
 	}
 
-	@Scheduled(cron = "0 * * * * *")
+	@Scheduled(cron = "${spring.session.cleanup.cron.expression:0 * * * * *}")
 	public void cleanUpExpiredSessions() {
 		int deletedCount = this.transactionOperations.execute(new TransactionCallback<Integer>() {
 

spring-session/src/main/java/org/springframework/session/jdbc/config/annotation/web/http/JdbcHttpSessionConfiguration.java

@@ -26,6 +26,7 @@ import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.ImportAware;
+import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
 import org.springframework.core.annotation.AnnotationAttributes;
 import org.springframework.core.convert.ConversionService;
 import org.springframework.core.convert.support.GenericConversionService;
@@ -190,4 +191,12 @@ public class JdbcHttpSessionConfiguration extends SpringHttpSessionConfiguration
 				.getNumber("maxInactiveIntervalInSeconds");
 	}
 
+	/**
+	 * Property placeholder to process the @Scheduled annotation.
+	 * @return the {@link PropertySourcesPlaceholderConfigurer} to use
+	 */
+	@Bean
+	public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
+		return new PropertySourcesPlaceholderConfigurer();
+	}
 }

spring-session/src/test/java/org/springframework/session/data/redis/config/annotation/web/http/RedisHttpSessionConfigurationCustomCronTests.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2014-2016 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.
+ * 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.springframework.session.data.redis.config.annotation.web.http;
+
+import org.assertj.core.api.ThrowableAssert.ThrowingCallable;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.data.redis.connection.RedisConnection;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+
+/**
+ * @author Rob Winch
+ *
+ */
+public class RedisHttpSessionConfigurationCustomCronTests {
+
+	AnnotationConfigApplicationContext context;
+
+	@Before
+	public void setup() {
+		this.context = new AnnotationConfigApplicationContext();
+	}
+
+	@After
+	public void closeContext() {
+		if (this.context != null) {
+			this.context.close();
+		}
+	}
+
+	@Test
+	public void overrideCron() {
+		this.context.register(Config.class);
+
+		assertThatThrownBy(new ThrowingCallable() {
+			public void call() throws Throwable {
+				RedisHttpSessionConfigurationCustomCronTests.this.context.refresh();
+			}
+		}).hasStackTraceContaining(
+				"Encountered invalid @Scheduled method 'cleanupExpiredSessions': Cron expression must consist of 6 fields (found 1 in \"oops\")");
+	}
+
+	@EnableRedisHttpSession
+	@Configuration
+	@PropertySource("classpath:spring-session-cleanup-cron-expression-oops.properties")
+	static class Config {
+		@Bean
+		public RedisConnectionFactory connectionFactory() {
+			RedisConnectionFactory factory = mock(RedisConnectionFactory.class);
+			RedisConnection connection = mock(RedisConnection.class);
+			given(factory.getConnection()).willReturn(connection);
+
+			return factory;
+		}
+	}
+}

spring-session/src/test/java/org/springframework/session/jdbc/config/annotation/web/http/JdbcHttpSessionConfigurationCustomCronTests.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2014-2016 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.
+ * 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.springframework.session.jdbc.config.annotation.web.http;
+
+import javax.sql.DataSource;
+
+import org.assertj.core.api.ThrowableAssert.ThrowingCallable;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.transaction.PlatformTransactionManager;
+
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.mockito.Mockito.mock;
+
+/**
+ * @author Rob Winch
+ *
+ */
+public class JdbcHttpSessionConfigurationCustomCronTests {
+
+	AnnotationConfigApplicationContext context;
+
+	@Before
+	public void setup() {
+		this.context = new AnnotationConfigApplicationContext();
+	}
+
+	@After
+	public void closeContext() {
+		if (this.context != null) {
+			this.context.close();
+		}
+	}
+
+	@Test
+	public void overrideCron() {
+		this.context.register(Config.class);
+
+		assertThatThrownBy(new ThrowingCallable() {
+			public void call() throws Throwable {
+				JdbcHttpSessionConfigurationCustomCronTests.this.context.refresh();
+			}
+		}).hasStackTraceContaining(
+				"Encountered invalid @Scheduled method 'cleanUpExpiredSessions': Cron expression must consist of 6 fields (found 1 in \"oops\")");
+	}
+
+	@EnableJdbcHttpSession
+	@Configuration
+	@PropertySource("classpath:spring-session-cleanup-cron-expression-oops.properties")
+	static class Config {
+		@Bean
+		public DataSource dataSource() {
+			return mock(DataSource.class);
+		}
+
+		@Bean
+		public PlatformTransactionManager transactionManager() {
+			return mock(PlatformTransactionManager.class);
+		}
+	}
+}

spring-session/src/test/resources/spring-session-cleanup-cron-expression-oops.properties

@@ -0,0 +1 @@
+spring.session.cleanup.cron.expression=oops