feat!: Integrate Memory Service into ADK runtime

core/src/main/java/com/google/adk/agents/InvocationContext.java

@@ -18,8 +18,10 @@
 
 import com.google.adk.artifacts.BaseArtifactService;
 import com.google.adk.exceptions.LlmCallsLimitExceededException;
+import com.google.adk.memory.BaseMemoryService;
 import com.google.adk.sessions.BaseSessionService;
 import com.google.adk.sessions.Session;
+import com.google.errorprone.annotations.InlineMe;
 import com.google.genai.types.Content;
 import java.util.Map;
 import java.util.Objects;
@@ -33,6 +35,7 @@ public class InvocationContext {
 
   private final BaseSessionService sessionService;
   private final BaseArtifactService artifactService;
+  private final BaseMemoryService memoryService;
   private final Optional<LiveRequestQueue> liveRequestQueue;
   private final Map<String, ActiveStreamingTool> activeStreamingTools = new ConcurrentHashMap<>();
 
@@ -46,9 +49,10 @@ public class InvocationContext {
   private boolean endInvocation;
   private final InvocationCostManager invocationCostManager = new InvocationCostManager();
 
-  private InvocationContext(
+  public InvocationContext(
       BaseSessionService sessionService,
       BaseArtifactService artifactService,
+      BaseMemoryService memoryService,
       Optional<LiveRequestQueue> liveRequestQueue,
       Optional<String> branch,
       String invocationId,
@@ -59,6 +63,7 @@ private InvocationContext(
       boolean endInvocation) {
     this.sessionService = sessionService;
     this.artifactService = artifactService;
+    this.memoryService = memoryService;
     this.liveRequestQueue = liveRequestQueue;
     this.branch = branch;
     this.invocationId = invocationId;
@@ -69,6 +74,16 @@ private InvocationContext(
     this.endInvocation = endInvocation;
   }
 
+  /**
+   * @deprecated Use the {@link #InvocationContext} constructor directly instead
+   */
+  @InlineMe(
+      replacement =
+          "new InvocationContext(sessionService, artifactService, null, Optional.empty(),"
+              + " Optional.empty(), invocationId, agent, session, Optional.ofNullable(userContent),"
+              + " runConfig, false)",
+      imports = {"com.google.adk.agents.InvocationContext", "java.util.Optional"})
+  @Deprecated
   public static InvocationContext create(
       BaseSessionService sessionService,
       BaseArtifactService artifactService,
@@ -80,7 +95,8 @@ public static InvocationContext create(
     return new InvocationContext(
         sessionService,
         artifactService,
-        Optional.empty(),
+        /* memoryService= */ null,
+        /* liveRequestQueue= */ Optional.empty(),
         /* branch= */ Optional.empty(),
         invocationId,
         agent,
@@ -90,6 +106,17 @@ public static InvocationContext create(
         false);
   }
 
+  /**
+   * @deprecated Use the {@link #InvocationContext} constructor directly instead
+   */
+  @InlineMe(
+      replacement =
+          "new InvocationContext(sessionService, artifactService, null,"
+              + " Optional.ofNullable(liveRequestQueue), Optional.empty(),"
+              + " InvocationContext.newInvocationContextId(), agent, session, Optional.empty(),"
+              + " runConfig, false)",
+      imports = {"com.google.adk.agents.InvocationContext", "java.util.Optional"})
+  @Deprecated
   public static InvocationContext create(
       BaseSessionService sessionService,
       BaseArtifactService artifactService,
@@ -100,6 +127,7 @@ public static InvocationContext create(
     return new InvocationContext(
         sessionService,
         artifactService,
+        /* memoryService= */ null,
         Optional.ofNullable(liveRequestQueue),
         /* branch= */ Optional.empty(),
         InvocationContext.newInvocationContextId(),
@@ -115,6 +143,7 @@ public static InvocationContext copyOf(InvocationContext other) {
         new InvocationContext(
             other.sessionService,
             other.artifactService,
+            other.memoryService,
             other.liveRequestQueue,
             other.branch,
             other.invocationId,
@@ -135,6 +164,10 @@ public BaseArtifactService artifactService() {
     return artifactService;
   }
 
+  public BaseMemoryService memoryService() {
+    return memoryService;
+  }
+
   public Map<String, ActiveStreamingTool> activeStreamingTools() {
     return activeStreamingTools;
   }
@@ -226,6 +259,7 @@ public boolean equals(Object o) {
     return endInvocation == that.endInvocation
         && Objects.equals(sessionService, that.sessionService)
         && Objects.equals(artifactService, that.artifactService)
+        && Objects.equals(memoryService, that.memoryService)
         && Objects.equals(liveRequestQueue, that.liveRequestQueue)
         && Objects.equals(activeStreamingTools, that.activeStreamingTools)
         && Objects.equals(branch, that.branch)
@@ -241,6 +275,7 @@ public int hashCode() {
     return Objects.hash(
         sessionService,
         artifactService,
+        memoryService,
         liveRequestQueue,
         activeStreamingTools,
         branch,

core/src/main/java/com/google/adk/memory/InMemoryMemoryService.java

@@ -118,9 +118,9 @@ public Single<SearchMemoryResponse> searchMemory(String appName, String userId,
               if (!Collections.disjoint(wordsInQuery, wordsInEvent)) {
                 MemoryEntry memory =
                     MemoryEntry.builder()
-                        .setContent(event.content().get())
-                        .setAuthor(event.author())
-                        .setTimestamp(formatTimestamp(event.timestamp()))
+                        .content(event.content().get())
+                        .author(event.author())
+                        .timestamp(formatTimestamp(event.timestamp()))
                         .build();
                 matchingMemories.add(memory);
               }

core/src/main/java/com/google/adk/memory/MemoryEntry.java

@@ -16,20 +16,26 @@
 
 package com.google.adk.memory;
 
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.google.auto.value.AutoValue;
 import com.google.genai.types.Content;
 import java.time.Instant;
 import javax.annotation.Nullable;
 
 /** Represents one memory entry. */
 @AutoValue
+@JsonDeserialize(builder = MemoryEntry.Builder.class)
 public abstract class MemoryEntry {
 
   /** Returns the main content of the memory. */
+  @JsonProperty("content")
   public abstract Content content();
 
   /** Returns the author of the memory, or null if not set. */
   @Nullable
+  @JsonProperty("author")
   public abstract String author();
 
   /**
@@ -56,27 +62,35 @@ public static Builder builder() {
   @AutoValue.Builder
   public abstract static class Builder {
 
+    @JsonCreator
+    static Builder create() {
+      return new AutoValue_MemoryEntry.Builder();
+    }
+
     /**
      * Sets the main content of the memory.
      *
      * <p>This is a required field.
      */
-    public abstract Builder setContent(Content content);
+    @JsonProperty("content")
+    public abstract Builder content(Content content);
 
     /** Sets the author of the memory. */
-    public abstract Builder setAuthor(@Nullable String author);
+    @JsonProperty("author")
+    public abstract Builder author(@Nullable String author);
 
     /** Sets the timestamp when the original content of this memory happened. */
-    public abstract Builder setTimestamp(@Nullable String timestamp);
+    @JsonProperty("timestamp")
+    public abstract Builder timestamp(@Nullable String timestamp);
 
     /**
      * A convenience method to set the timestamp from an {@link Instant} object, formatted as an ISO
      * 8601 string.
      *
      * @param instant The timestamp as an Instant object.
      */
-    public Builder setTimestamp(Instant instant) {
-      return setTimestamp(instant.toString());
+    public Builder timestamp(Instant instant) {
+      return timestamp(instant.toString());
     }
 
     /** Builds the immutable {@link MemoryEntry} object. */

core/src/main/java/com/google/adk/runner/InMemoryRunner.java

@@ -18,6 +18,7 @@
 
 import com.google.adk.agents.BaseAgent;
 import com.google.adk.artifacts.InMemoryArtifactService;
+import com.google.adk.memory.InMemoryMemoryService;
 import com.google.adk.sessions.InMemorySessionService;
 
 /** The class for the in-memory GenAi runner, using in-memory artifact and session services. */
@@ -30,6 +31,11 @@ public InMemoryRunner(BaseAgent agent) {
   }
 
   public InMemoryRunner(BaseAgent agent, String appName) {
-    super(agent, appName, new InMemoryArtifactService(), new InMemorySessionService());
+    super(
+        agent,
+        appName,
+        new InMemoryArtifactService(),
+        new InMemorySessionService(),
+        new InMemoryMemoryService());
   }
 }

core/src/main/java/com/google/adk/runner/Runner.java

@@ -25,12 +25,14 @@
 import com.google.adk.agents.RunConfig;
 import com.google.adk.artifacts.BaseArtifactService;
 import com.google.adk.events.Event;
+import com.google.adk.memory.BaseMemoryService;
 import com.google.adk.sessions.BaseSessionService;
 import com.google.adk.sessions.Session;
 import com.google.adk.tools.BaseTool;
 import com.google.adk.tools.FunctionTool;
 import com.google.adk.utils.CollectionUtils;
 import com.google.common.collect.ImmutableList;
+import com.google.errorprone.annotations.InlineMe;
 import com.google.genai.types.AudioTranscriptionConfig;
 import com.google.genai.types.Content;
 import com.google.genai.types.Modality;
@@ -53,17 +55,36 @@ public class Runner {
   private final String appName;
   private final BaseArtifactService artifactService;
   private final BaseSessionService sessionService;
+  private final BaseMemoryService memoryService;
 
   /** Creates a new {@code Runner}. */
   public Runner(
       BaseAgent agent,
       String appName,
       BaseArtifactService artifactService,
-      BaseSessionService sessionService) {
+      BaseSessionService sessionService,
+      BaseMemoryService memoryService) {
     this.agent = agent;
     this.appName = appName;
     this.artifactService = artifactService;
     this.sessionService = sessionService;
+    this.memoryService = memoryService;
+  }
+
+  /**
+   * Creates a new {@code Runner}.
+   *
+   * @deprecated Use the constructor with {@code BaseMemoryService} instead even if with a null if
+   *     you don't need the memory service.
+   */
+  @InlineMe(replacement = "this(agent, appName, artifactService, sessionService, null)")
+  @Deprecated
+  public Runner(
+      BaseAgent agent,
+      String appName,
+      BaseArtifactService artifactService,
+      BaseSessionService sessionService) {
+    this(agent, appName, artifactService, sessionService, null);
   }
 
   public BaseAgent agent() {
@@ -82,6 +103,10 @@ public BaseSessionService sessionService() {
     return this.sessionService;
   }
 
+  public BaseMemoryService memoryService() {
+    return this.memoryService;
+  }
+
   /**
    * Appends a new user message to the session history.
    *
@@ -185,13 +210,10 @@ public Flowable<Event> runAsync(Session session, Content newMessage, RunConfig r
               sess -> {
                 BaseAgent rootAgent = this.agent;
                 InvocationContext invocationContext =
-                    InvocationContext.create(
-                        this.sessionService,
-                        this.artifactService,
-                        InvocationContext.newInvocationContextId(),
-                        rootAgent,
+                    newInvocationContext(
                         sess,
-                        newMessage,
+                        Optional.of(newMessage),
+                        /* liveRequestQueue= */ Optional.empty(),
                         runConfig);
 
                 if (newMessage != null) {
@@ -240,7 +262,8 @@ private InvocationContext newInvocationContextForLive(
         }
       }
     }
-    return newInvocationContext(session, liveRequestQueue, runConfigBuilder.build());
+    return newInvocationContext(
+        session, /* newMessage= */ Optional.empty(), liveRequestQueue, runConfigBuilder.build());
   }
 
   /**
@@ -249,16 +272,24 @@ private InvocationContext newInvocationContextForLive(
    * @return a new {@link InvocationContext}.
    */
   private InvocationContext newInvocationContext(
-      Session session, Optional<LiveRequestQueue> liveRequestQueue, RunConfig runConfig) {
+      Session session,
+      Optional<Content> newMessage,
+      Optional<LiveRequestQueue> liveRequestQueue,
+      RunConfig runConfig) {
     BaseAgent rootAgent = this.agent;
     InvocationContext invocationContext =
-        InvocationContext.create(
+        new InvocationContext(
             this.sessionService,
             this.artifactService,
+            this.memoryService,
+            liveRequestQueue,
+            /* branch= */ Optional.empty(),
+            InvocationContext.newInvocationContextId(),
             rootAgent,
             session,
-            liveRequestQueue.orElse(null),
-            runConfig);
+            newMessage,
+            runConfig,
+            /* endInvocation= */ false);
     invocationContext.agent(this.findAgentToRun(session, rootAgent));
     return invocationContext;
   }