Add RedisFlushMode

This commit allows Redis support to flush lazily (already
supported) or immediately (new).

Fixes gh-273

spring-session/src/integration-test/java/org/springframework/session/data/redis/flushimmediately/RedisHttpSessionConfig.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2002-2016 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.flushimmediately;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
+import org.springframework.session.data.redis.RedisFlushMode;
+import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;
+
+/**
+ * @author Rob Winch
+ *
+ */
+@Configuration
+@EnableRedisHttpSession(redisFlushMode = RedisFlushMode.IMMEDIATE)
+public class RedisHttpSessionConfig {
+	@Bean
+	public JedisConnectionFactory connectionFactory() throws Exception {
+		JedisConnectionFactory factory = new JedisConnectionFactory();
+		factory.setUsePool(false);
+		return factory;
+	}
+}

spring-session/src/integration-test/java/org/springframework/session/data/redis/flushimmediately/RedisOperationsSessionRepositoryFlushImmediatelyITests.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2002-2015 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.flushimmediately;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.session.ExpiringSession;
+import org.springframework.session.SessionRepository;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes=RedisHttpSessionConfig.class)
+@WebAppConfiguration
+public class RedisOperationsSessionRepositoryFlushImmediatelyITests<S extends ExpiringSession> {
+
+	@Autowired
+	private SessionRepository<S> sessionRepository;
+
+	@Test
+	public void savesOnCreate() throws InterruptedException {
+		S created = sessionRepository.createSession();
+
+		S getSession = sessionRepository.getSession(created.getId());
+
+		assertThat(getSession).isNotNull();
+	}
+}