feat: add grpc config options and turn off keepalive for Lambda config

.gitignore

@@ -45,3 +45,5 @@ examples/lib/.settings
 examples/lib/.classpath
 examples/lib/.project
 examples/lib/bin
+.vscode/
+*logback.xml

momento-sdk/src/main/java/momento/sdk/CacheClient.java

@@ -81,7 +81,7 @@ public CacheClient(
       @Nonnull CredentialProvider credentialProvider,
       @Nonnull Configuration configuration,
       @Nonnull Duration itemDefaultTtl) {
-    this.scsControlClient = new ScsControlClient(credentialProvider);
+    this.scsControlClient = new ScsControlClient(credentialProvider, configuration);
     this.scsDataClient = new ScsDataClient(credentialProvider, configuration, itemDefaultTtl);
 
     logger.info("Creating Momento Cache Client");

momento-sdk/src/main/java/momento/sdk/ScsControlClient.java

@@ -30,6 +30,7 @@
 import java.util.stream.Collectors;
 import javax.annotation.Nonnull;
 import momento.sdk.auth.CredentialProvider;
+import momento.sdk.config.Configuration;
 import momento.sdk.exceptions.CacheServiceExceptionMapper;
 import momento.sdk.exceptions.InternalServerException;
 import momento.sdk.responses.cache.control.CacheCreateResponse;
@@ -48,9 +49,10 @@ final class ScsControlClient extends ScsClient {
   private final CredentialProvider credentialProvider;
   private final ScsControlGrpcStubsManager controlGrpcStubsManager;
 
-  ScsControlClient(@Nonnull CredentialProvider credentialProvider) {
+  ScsControlClient(@Nonnull CredentialProvider credentialProvider, Configuration configuration) {
     this.credentialProvider = credentialProvider;
-    this.controlGrpcStubsManager = new ScsControlGrpcStubsManager(credentialProvider);
+    this.controlGrpcStubsManager =
+        new ScsControlGrpcStubsManager(credentialProvider, configuration);
   }
 
   CompletableFuture<CacheCreateResponse> createCache(String cacheName) {

momento-sdk/src/main/java/momento/sdk/ScsControlGrpcStubsManager.java

@@ -10,6 +10,9 @@
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Nonnull;
 import momento.sdk.auth.CredentialProvider;
+import momento.sdk.config.Configuration;
+import momento.sdk.config.transport.GrpcConfiguration;
+import momento.sdk.internal.GrpcChannelOptions;
 
 /**
  * Manager responsible for GRPC channels and stubs for the Control Plane.
@@ -26,16 +29,29 @@ final class ScsControlGrpcStubsManager implements AutoCloseable {
 
   private final ScsControlGrpc.ScsControlFutureStub futureStub;
 
-  ScsControlGrpcStubsManager(@Nonnull CredentialProvider credentialProvider) {
-    this.channel = setupConnection(credentialProvider);
+  ScsControlGrpcStubsManager(
+      @Nonnull CredentialProvider credentialProvider, Configuration configuration) {
+    this.channel = setupConnection(credentialProvider, configuration);
     this.futureStub = ScsControlGrpc.newFutureStub(channel);
   }
 
-  private static ManagedChannel setupConnection(CredentialProvider credentialProvider) {
+  private static ManagedChannel setupConnection(
+      CredentialProvider credentialProvider, Configuration configuration) {
     final NettyChannelBuilder channelBuilder =
         NettyChannelBuilder.forAddress(credentialProvider.getControlEndpoint(), 443);
-    channelBuilder.useTransportSecurity();
-    channelBuilder.disableRetry();
+
+    // Override grpc config to disable keepalive for control clients
+    final GrpcConfiguration controlConfig =
+        configuration
+            .getTransportStrategy()
+            .getGrpcConfiguration()
+            .withKeepAliveTime(0)
+            .withKeepAliveTimeout(0)
+            .withKeepAliveWithoutCalls(false);
+
+    // set additional channel options (message size, keepalive, auth, etc)
+    GrpcChannelOptions.GrpcOptionsFromGrpcConfig(controlConfig, channelBuilder);
+
     final List<ClientInterceptor> clientInterceptors = new ArrayList<>();
     clientInterceptors.add(new UserHeaderInterceptor(credentialProvider.getAuthToken()));
     channelBuilder.intercept(clientInterceptors);

momento-sdk/src/main/java/momento/sdk/ScsDataGrpcStubsManager.java

@@ -23,6 +23,7 @@
 import javax.annotation.Nonnull;
 import momento.sdk.auth.CredentialProvider;
 import momento.sdk.config.Configuration;
+import momento.sdk.internal.GrpcChannelOptions;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -171,8 +172,11 @@ private ManagedChannel setupChannel(
       CredentialProvider credentialProvider, Configuration configuration) {
     final NettyChannelBuilder channelBuilder =
         NettyChannelBuilder.forAddress(credentialProvider.getCacheEndpoint(), 443);
-    channelBuilder.useTransportSecurity();
-    channelBuilder.disableRetry();
+
+    // set additional channel options (message size, keepalive, auth, etc)
+    GrpcChannelOptions.GrpcOptionsFromGrpcConfig(
+        configuration.getTransportStrategy().getGrpcConfiguration(), channelBuilder);
+
     final List<ClientInterceptor> clientInterceptors = new ArrayList<>();
     clientInterceptors.add(new UserHeaderInterceptor(credentialProvider.getAuthToken()));
     clientInterceptors.add(

momento-sdk/src/main/java/momento/sdk/ScsTokenGrpcStubsManager.java

@@ -9,6 +9,8 @@
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Nonnull;
 import momento.sdk.auth.CredentialProvider;
+import momento.sdk.config.transport.GrpcConfiguration;
+import momento.sdk.internal.GrpcChannelOptions;
 import momento.token.TokenGrpc;
 
 /**
@@ -34,8 +36,14 @@ final class ScsTokenGrpcStubsManager implements AutoCloseable {
   private static ManagedChannel setupConnection(CredentialProvider credentialProvider) {
     final NettyChannelBuilder channelBuilder =
         NettyChannelBuilder.forAddress(credentialProvider.getTokenEndpoint(), 443);
-    channelBuilder.useTransportSecurity();
-    channelBuilder.disableRetry();
+
+    // Note: This is hard-coded for now but we may want to expose it via configuration object
+    // in the future, as we do with some of the other clients.
+    final GrpcConfiguration grpcConfig = new GrpcConfiguration(Duration.ofMillis(15000));
+
+    // set additional channel options (message size, keepalive, auth, etc)
+    GrpcChannelOptions.GrpcOptionsFromGrpcConfig(grpcConfig, channelBuilder);
+
     final List<ClientInterceptor> clientInterceptors = new ArrayList<>();
     clientInterceptors.add(new UserHeaderInterceptor(credentialProvider.getAuthToken()));
     channelBuilder.intercept(clientInterceptors);

momento-sdk/src/main/java/momento/sdk/ScsTopicGrpcStubsManager.java

@@ -7,10 +7,10 @@
 import java.io.Closeable;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.TimeUnit;
 import javax.annotation.Nonnull;
 import momento.sdk.auth.CredentialProvider;
 import momento.sdk.config.TopicConfiguration;
+import momento.sdk.internal.GrpcChannelOptions;
 
 /**
  * Manager responsible for GRPC channels and stubs for the Topics.
@@ -28,20 +28,19 @@ final class ScsTopicGrpcStubsManager implements Closeable {
 
   ScsTopicGrpcStubsManager(
       @Nonnull CredentialProvider credentialProvider, @Nonnull TopicConfiguration configuration) {
-    this.channel = setupConnection(credentialProvider);
+    this.channel = setupConnection(credentialProvider, configuration);
     this.stub = PubsubGrpc.newStub(channel);
     this.configuration = configuration;
   }
 
-  private static ManagedChannel setupConnection(CredentialProvider credentialProvider) {
+  private static ManagedChannel setupConnection(
+      CredentialProvider credentialProvider, TopicConfiguration configuration) {
     final NettyChannelBuilder channelBuilder =
         NettyChannelBuilder.forAddress(credentialProvider.getCacheEndpoint(), 443);
-    channelBuilder.useTransportSecurity();
-    channelBuilder.disableRetry();
 
-    channelBuilder.keepAliveTime(10, TimeUnit.SECONDS);
-    channelBuilder.keepAliveTimeout(5, TimeUnit.SECONDS);
-    channelBuilder.keepAliveWithoutCalls(true);
+    // set additional channel options (message size, keepalive, auth, etc)
+    GrpcChannelOptions.GrpcOptionsFromGrpcConfig(
+        configuration.getTransportStrategy().getGrpcConfiguration(), channelBuilder);
 
     final List<ClientInterceptor> clientInterceptors = new ArrayList<>();
     clientInterceptors.add(new UserHeaderInterceptor(credentialProvider.getAuthToken()));

momento-sdk/src/main/java/momento/sdk/config/Configurations.java

@@ -137,11 +137,22 @@ private Lambda(TransportStrategy transportStrategy, RetryStrategy retryStrategy)
      * <p>This configuration may change in future releases to take advantage of improvements we
      * identify for default configurations.
      *
+     * <p>NOTE: keep-alives are very important for long-lived server environments where there may be
+     * periods of time when the connection is idle. However, they are very problematic for lambda
+     * environments where the lambda runtime is continuously frozen and unfrozen, because the lambda
+     * may be frozen before the "ACK" is received from the server. This can cause the keep-alive to
+     * timeout even though the connection is completely healthy. Therefore, keep-alives should be
+     * disabled in lambda and similar environments.
+     *
      * @return the latest Lambda configuration
      */
     public static Configuration latest() {
-      final TransportStrategy transportStrategy =
-          new StaticTransportStrategy(new GrpcConfiguration(Duration.ofMillis(1100)));
+      final GrpcConfiguration grpcConfig =
+          new GrpcConfiguration(Duration.ofMillis(1100))
+              .withKeepAliveTime(0)
+              .withKeepAliveTimeout(0)
+              .withKeepAliveWithoutCalls(false);
+      final TransportStrategy transportStrategy = new StaticTransportStrategy(grpcConfig);
       final RetryStrategy retryStrategy =
           new FixedCountRetryStrategy(DEFAULT_MAX_RETRIES, new DefaultRetryEligibilityStrategy());
       return new Lambda(transportStrategy, retryStrategy);

momento-sdk/src/main/java/momento/sdk/config/TopicConfigurations.java

@@ -28,8 +28,11 @@ private Laptop(TransportStrategy transportStrategy, Logger logger) {
      * @return the latest Laptop configuration
      */
     public static TopicConfiguration latest() {
-      final TransportStrategy transportStrategy =
-          new StaticTransportStrategy(new GrpcConfiguration(Duration.ofMillis(15000)));
+      final GrpcConfiguration grpcConfig =
+          new GrpcConfiguration(Duration.ofMillis(15000))
+              .withKeepAliveTime(10000)
+              .withKeepAliveTimeout(5000);
+      final TransportStrategy transportStrategy = new StaticTransportStrategy(grpcConfig);
       final Logger logger = LoggerFactory.getLogger(TopicConfiguration.class);
       return new Laptop(transportStrategy, logger);
     }
@@ -54,8 +57,11 @@ private InRegion(TransportStrategy transportStrategy, Logger logger) {
      * @return the latest in-region configuration
      */
     public static TopicConfiguration latest() {
-      final TransportStrategy transportStrategy =
-          new StaticTransportStrategy(new GrpcConfiguration(Duration.ofMillis(1100)));
+      final GrpcConfiguration grpcConfig =
+          new GrpcConfiguration(Duration.ofMillis(1100))
+              .withKeepAliveTime(10000)
+              .withKeepAliveTimeout(5000);
+      final TransportStrategy transportStrategy = new StaticTransportStrategy(grpcConfig);
       final Logger logger = LoggerFactory.getLogger(TopicConfiguration.class);
       return new InRegion(transportStrategy, logger);
     }
@@ -81,8 +87,11 @@ private LowLatency(TransportStrategy transportStrategy, Logger logger) {
      * @return the latest low-latency configuration
      */
     public static TopicConfiguration latest() {
-      final TransportStrategy transportStrategy =
-          new StaticTransportStrategy(new GrpcConfiguration(Duration.ofMillis(500)));
+      final GrpcConfiguration grpcConfig =
+          new GrpcConfiguration(Duration.ofMillis(500))
+              .withKeepAliveTime(10000)
+              .withKeepAliveTimeout(5000);
+      final TransportStrategy transportStrategy = new StaticTransportStrategy(grpcConfig);
       final Logger logger = LoggerFactory.getLogger(TopicConfiguration.class);
       return new LowLatency(transportStrategy, logger);
     }