Move SDK-provided global execution.interceptors a hard-coded list. (aws#2734)

This reduces the need for customers to use a special transformer for execution.interceptors files when they are creating an uber-jar of all SDK modules. Customers should still consider using such an appender, in case other libraries rely on execution.interceptors files.

Author: millems

.changes/next-release/feature-AWSSDKforJavav2-69eb988.json

@@ -0,0 +1,6 @@
+{
+    "category": "AWS SDK for Java v2", 
+    "contributor": "", 
+    "type": "feature", 
+    "description": "Remove SDK usage of global execution.interceptors files. This reduces the need for customers to use a special transformer for execution.interceptors files when they are creating an uber-jar of all SDK modules. Customers should still consider using such an appender, in case other libraries rely on execution.interceptors files."
+}

core/aws-core/src/main/java/software/amazon/awssdk/awscore/client/builder/AwsDefaultClientBuilder.java

@@ -16,7 +16,7 @@
 package software.amazon.awssdk.awscore.client.builder;
 
 import java.net.URI;
-import java.util.Collections;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Optional;
 import software.amazon.awssdk.annotations.SdkProtectedApi;
@@ -26,6 +26,7 @@
 import software.amazon.awssdk.awscore.client.config.AwsAdvancedClientOption;
 import software.amazon.awssdk.awscore.client.config.AwsClientOption;
 import software.amazon.awssdk.awscore.endpoint.DefaultServiceEndpointBuilder;
+import software.amazon.awssdk.awscore.eventstream.EventStreamInitialRequestInterceptor;
 import software.amazon.awssdk.awscore.interceptor.HelpfulUnknownHostExceptionInterceptor;
 import software.amazon.awssdk.awscore.retry.AwsRetryPolicy;
 import software.amazon.awssdk.core.client.builder.SdkDefaultClientBuilder;
@@ -267,6 +268,7 @@ private List<ExecutionInterceptor> addAwsInterceptors(SdkClientConfiguration con
     }
 
     private List<ExecutionInterceptor> awsInterceptors() {
-        return Collections.singletonList(new HelpfulUnknownHostExceptionInterceptor());
+        return Arrays.asList(new HelpfulUnknownHostExceptionInterceptor(),
+                             new EventStreamInitialRequestInterceptor());
     }
 }

core/aws-core/src/main/resources/software/amazon/awssdk/global/handlers/execution.interceptors

@@ -42,6 +42,7 @@
 
 import java.net.URI;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Optional;
@@ -63,6 +64,7 @@
 import software.amazon.awssdk.core.interceptor.ExecutionInterceptor;
 import software.amazon.awssdk.core.internal.http.loader.DefaultSdkAsyncHttpClientBuilder;
 import software.amazon.awssdk.core.internal.http.loader.DefaultSdkHttpClientBuilder;
+import software.amazon.awssdk.core.internal.interceptor.HttpChecksumRequiredInterceptor;
 import software.amazon.awssdk.core.retry.RetryMode;
 import software.amazon.awssdk.core.retry.RetryPolicy;
 import software.amazon.awssdk.core.util.SdkUserAgent;
@@ -334,10 +336,20 @@ private ScheduledExecutorService resolveScheduledExecutorService() {
      * Finalize which execution interceptors will be used for the created client.
      */
     private List<ExecutionInterceptor> resolveExecutionInterceptors(SdkClientConfiguration config) {
-        List<ExecutionInterceptor> globalInterceptors = new ClasspathInterceptorChainFactory().getGlobalInterceptors();
+        List<ExecutionInterceptor> globalInterceptors = new ArrayList<>();
+        globalInterceptors.addAll(sdkInterceptors());
+        globalInterceptors.addAll(new ClasspathInterceptorChainFactory().getGlobalInterceptors());
         return mergeLists(globalInterceptors, config.option(EXECUTION_INTERCEPTORS));
     }
 
+
+    /**
+     * The set of interceptors that should be included with all services.
+     */
+    private List<ExecutionInterceptor> sdkInterceptors() {
+        return Collections.singletonList(new HttpChecksumRequiredInterceptor());
+    }
+
     @Override
     public final B endpointOverride(URI endpointOverride) {
         Validate.paramNotNull(endpointOverride, "endpointOverride");