[GH-3208] Feat: Allow overriding SmartLifecycle phase in RedisMessageListenerContainer.

Signed-off-by: Su Ko <[email protected]>

Author: bandalgomsu

src/main/java/org/springframework/data/redis/listener/RedisMessageListenerContainer.java

@@ -103,6 +103,7 @@
  * @author Mark Paluch
  * @author John Blum
  * @author Seongjun Lee
+ * @author Su Ko
  * @see MessageListener
  * @see SubscriptionListener
  */
@@ -168,6 +169,8 @@ public class RedisMessageListenerContainer implements InitializingBean, Disposab
 
 	private @Nullable Subscriber subscriber;
 
+    private int phase = Integer.MAX_VALUE;
+
 	/**
 	 * Set an ErrorHandler to be invoked in case of any uncaught exceptions thrown while processing a Message. By default,
 	 * there will be <b>no</b> ErrorHandler so that error-level logging is the only result.
@@ -618,6 +621,22 @@ public void removeMessageListener(MessageListener listener) {
 		removeMessageListener(listener, Collections.emptySet());
 	}
 
+    @Override
+    public int getPhase() {
+        return this.phase;
+    }
+
+    /**
+     * Specify the lifecycle phase for this container.
+     * Lower values start earlier and stop later.
+     * The default is {@code Integer.MAX_VALUE}.
+     *
+     * @see SmartLifecycle#getPhase()
+     */
+    public void setPhase(int phase) {
+        this.phase = phase;
+    }
+
 	private void initMapping(Map<? extends MessageListener, Collection<? extends Topic>> listeners) {
 
 		// stop the listener if currently running

src/test/java/org/springframework/data/redis/listener/RedisMessageListenerContainerUnitTests.java

@@ -239,4 +239,15 @@ void shouldRemoveAllListenersWhenListenerIsNull() {
 
 		assertThatNoException().isThrownBy(() -> container.removeMessageListener(null, Collections.singletonList(topic)));
 	}
+
+    @Test // GH-3208
+    void defaultPhaseShouldBeMaxValue() {
+        assertThat(container.getPhase()).isEqualTo(Integer.MAX_VALUE);
+    }
+
+    @Test // GH-3208
+    void shouldApplyConfiguredPhase() {
+        container.setPhase(3208);
+        assertThat(container.getPhase()).isEqualTo(3208);
+    }
 }