feat(advisors): enable recursive advisor execution with two new built-in advisors

spring-ai-client-chat/pom.xml

@@ -44,6 +44,12 @@
 			<version>${project.version}</version>
 		</dependency>
 
+		<dependency>
+			<groupId>io.modelcontextprotocol.sdk</groupId>
+			<artifactId>mcp-json-jackson2</artifactId>
+			<version>${mcp.sdk.version}</version>
+		</dependency>
+
 		<dependency>
 			<groupId>com.fasterxml.jackson.module</groupId>
 			<artifactId>jackson-module-jsonSchema</artifactId>

spring-ai-client-chat/src/main/java/org/springframework/ai/chat/client/advisor/AdvisorUtils.java

@@ -24,6 +24,8 @@
 
 /**
  * Utilities to work with advisors.
+ *
+ * @author Christian Tzolov
  */
 public final class AdvisorUtils {
 

spring-ai-client-chat/src/main/java/org/springframework/ai/chat/client/advisor/DefaultAroundAdvisorChain.java

@@ -30,6 +30,7 @@
 import org.springframework.ai.chat.client.advisor.api.Advisor;
 import org.springframework.ai.chat.client.advisor.api.BaseAdvisorChain;
 import org.springframework.ai.chat.client.advisor.api.CallAdvisor;
+import org.springframework.ai.chat.client.advisor.api.CallAdvisorChain;
 import org.springframework.ai.chat.client.advisor.api.StreamAdvisor;
 import org.springframework.ai.chat.client.advisor.observation.AdvisorObservationContext;
 import org.springframework.ai.chat.client.advisor.observation.AdvisorObservationConvention;
@@ -133,6 +134,24 @@ public Flux<ChatClientResponse> nextStream(ChatClientRequest chatClientRequest)
 		});
 	}
 
+	@Override
+	public CallAdvisorChain copy(CallAdvisor after) {
+
+		Assert.notNull(after, "The after call advisor must not be null");
+
+		List<CallAdvisor> callAdvisors = this.getCallAdvisors();
+
+		int afterAdvisorIndex = callAdvisors.indexOf(after);
+
+		if (afterAdvisorIndex < 0) {
+			throw new IllegalArgumentException("The specified advisor is not part of the chain: " + after.getName());
+		}
+
+		var remainingCallAdvisors = callAdvisors.subList(afterAdvisorIndex + 1, callAdvisors.size());
+
+		return DefaultAroundAdvisorChain.builder(this.getObservationRegistry()).pushAll(remainingCallAdvisors).build();
+	}
+
 	@Override
 	public List<CallAdvisor> getCallAdvisors() {
 		return this.originalCallAdvisors;

spring-ai-client-chat/src/main/java/org/springframework/ai/chat/client/advisor/SimpleLoggerAdvisor.java

@@ -88,11 +88,11 @@ public Flux<ChatClientResponse> adviseStream(ChatClientRequest chatClientRequest
 		return new ChatClientMessageAggregator().aggregateChatClientResponse(chatClientResponses, this::logResponse);
 	}
 
-	private void logRequest(ChatClientRequest request) {
+	protected void logRequest(ChatClientRequest request) {
 		logger.debug("request: {}", this.requestToString.apply(request));
 	}
 
-	private void logResponse(ChatClientResponse chatClientResponse) {
+	protected void logResponse(ChatClientResponse chatClientResponse) {
 		logger.debug("response: {}", this.responseToString.apply(chatClientResponse.chatResponse()));
 	}