/
EndpointResolverInterceptorSpec.java
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/
EndpointResolverInterceptorSpec.java
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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package software.amazon.awssdk.codegen.poet.rules;
import com.fasterxml.jackson.core.TreeNode;
import com.fasterxml.jackson.jr.stree.JrsBoolean;
import com.fasterxml.jackson.jr.stree.JrsString;
import com.squareup.javapoet.ClassName;
import com.squareup.javapoet.MethodSpec;
import com.squareup.javapoet.TypeSpec;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.CompletionException;
import javax.lang.model.element.Modifier;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.awscore.AwsExecutionAttribute;
import software.amazon.awssdk.codegen.model.intermediate.IntermediateModel;
import software.amazon.awssdk.codegen.model.intermediate.OperationModel;
import software.amazon.awssdk.codegen.model.rules.endpoints.ParameterModel;
import software.amazon.awssdk.codegen.model.service.ClientContextParam;
import software.amazon.awssdk.codegen.model.service.ContextParam;
import software.amazon.awssdk.codegen.model.service.StaticContextParam;
import software.amazon.awssdk.codegen.poet.ClassSpec;
import software.amazon.awssdk.codegen.poet.PoetExtension;
import software.amazon.awssdk.codegen.poet.PoetUtils;
import software.amazon.awssdk.core.SdkRequest;
import software.amazon.awssdk.core.exception.SdkClientException;
import software.amazon.awssdk.core.interceptor.Context;
import software.amazon.awssdk.core.interceptor.ExecutionAttributes;
import software.amazon.awssdk.core.interceptor.ExecutionInterceptor;
import software.amazon.awssdk.core.interceptor.SdkInternalExecutionAttribute;
import software.amazon.awssdk.endpoints.Endpoint;
import software.amazon.awssdk.utils.AttributeMap;
public class EndpointResolverInterceptorSpec implements ClassSpec {
private final IntermediateModel model;
private final EndpointRulesSpecUtils endpointRulesSpecUtils;
private final PoetExtension poetExtension;
public EndpointResolverInterceptorSpec(IntermediateModel model) {
this.model = model;
this.endpointRulesSpecUtils = new EndpointRulesSpecUtils(model);
this.poetExtension = new PoetExtension(model);
}
@Override
public TypeSpec poetSpec() {
TypeSpec.Builder b = PoetUtils.createClassBuilder(className())
.addModifiers(Modifier.PUBLIC, Modifier.FINAL)
.addAnnotation(SdkInternalApi.class)
.addSuperinterface(ExecutionInterceptor.class);
b.addMethod(modifyRequestMethod());
b.addMethod(ruleParams());
b.addMethod(setContextParams());
addContextParamMethods(b);
b.addMethod(setStaticContextParamsMethod());
addStaticContextParamMethods(b);
if (hasClientContextParams()) {
b.addMethod(setClientContextParamsMethod());
}
return b.build();
}
@Override
public ClassName className() {
return endpointRulesSpecUtils.resolverInterceptorName();
}
private MethodSpec modifyRequestMethod() {
MethodSpec.Builder b = MethodSpec.methodBuilder("modifyRequest")
.addModifiers(Modifier.PUBLIC)
.addAnnotation(Override.class)
.returns(SdkRequest.class)
.addParameter(Context.ModifyRequest.class, "context")
.addParameter(ExecutionAttributes.class, "executionAttributes");
String providerVar = "provider";
// We skip resolution if the source of the endpoint is the endpoint discovery call
b.beginControlFlow("if ($1T.endpointIsDiscovered(executionAttributes))",
endpointRulesSpecUtils.rulesRuntimeClassName("AwsEndpointProviderUtils"));
b.addStatement("return context.request()");
b.endControlFlow();
b.addStatement("$1T $2N = ($1T) executionAttributes.getAttribute($3T.ENDPOINT_PROVIDER)",
endpointRulesSpecUtils.providerInterfaceName(), providerVar, SdkInternalExecutionAttribute.class);
b.beginControlFlow("try");
b.addStatement("$T result = $N.resolveEndpoint(ruleParams(context, executionAttributes)).join()", Endpoint.class,
providerVar);
b.addStatement("executionAttributes.putAttribute(SdkInternalExecutionAttribute.RESOLVED_ENDPOINT, result)");
b.addStatement("return context.request()");
b.endControlFlow();
b.beginControlFlow("catch ($T e)", CompletionException.class);
b.addStatement("$T cause = e.getCause()", Throwable.class);
b.beginControlFlow("if (cause instanceof $T)", SdkClientException.class);
b.addStatement("throw ($T) cause", SdkClientException.class);
b.endControlFlow();
b.beginControlFlow("else");
b.addStatement("throw $T.create($S, cause)", SdkClientException.class, "Endpoint resolution failed");
b.endControlFlow();
b.endControlFlow();
return b.build();
}
private MethodSpec ruleParams() {
MethodSpec.Builder b = MethodSpec.methodBuilder("ruleParams")
.addModifiers(Modifier.PRIVATE, Modifier.STATIC)
.returns(endpointRulesSpecUtils.parametersClassName())
.addParameter(Context.ModifyRequest.class, "context")
.addParameter(ExecutionAttributes.class, "executionAttributes");
b.addStatement("$T builder = $T.builder()", paramsBuilderClass(), endpointRulesSpecUtils.parametersClassName());
b.addStatement("setStaticContextParams(builder, executionAttributes.getAttribute($T.OPERATION_NAME))",
AwsExecutionAttribute.class);
b.addStatement("setContextParams(builder, executionAttributes.getAttribute($T.OPERATION_NAME), context.request())",
AwsExecutionAttribute.class);
if (hasClientContextParams()) {
b.addStatement("setClientContextParams(builder, executionAttributes)");
}
Map<String, ParameterModel> parameters = model.getEndpointRuleSetModel().getParameters();
parameters.forEach((n, m) -> {
if (m.getBuiltInEnum() == null) {
return;
}
String setterName = endpointRulesSpecUtils.paramMethodName(n);
String builtInFn;
switch (m.getBuiltInEnum()) {
case AWS_REGION:
builtInFn = "regionBuiltIn";
break;
case AWS_USE_DUAL_STACK:
builtInFn = "dualStackEnabledBuiltIn";
break;
case AWS_USE_FIPS:
builtInFn = "fipsEnabledBuiltIn";
break;
case SDK_ENDPOINT:
builtInFn = "endpointBuiltIn";
break;
case AWS_S3_USE_GLOBAL_ENDPOINT:
builtInFn = "useGlobalEndpointBuiltIn";
break;
// The S3 specific built-ins are set through the existing S3Configuration which is handled above
case AWS_S3_ACCELERATE:
case AWS_S3_DISABLE_MULTI_REGION_ACCESS_POINTS:
case AWS_S3_FORCE_PATH_STYLE:
case AWS_S3_USE_ARN_REGION:
case AWS_S3_CONTROL_USE_ARN_REGION:
// end of S3 specific builtins
case AWS_STS_USE_GLOBAL_ENDPOINT:
// V2 doesn't support this, only regional endpoints
return;
default:
throw new RuntimeException("Don't know how to set built-in " + m.getBuiltInEnum());
}
b.addStatement("builder.$N($T.$N(executionAttributes))", setterName,
endpointRulesSpecUtils.rulesRuntimeClassName("AwsEndpointProviderUtils"), builtInFn);
});
b.addStatement("return builder.build()");
return b.build();
}
private ClassName paramsBuilderClass() {
return endpointRulesSpecUtils.parametersClassName().nestedClass("Builder");
}
private MethodSpec addStaticContextParamsMethod(OperationModel opModel) {
String methodName = staticContextParamsMethodName(opModel);
MethodSpec.Builder b = MethodSpec.methodBuilder(methodName)
.addModifiers(Modifier.PRIVATE, Modifier.STATIC)
.returns(void.class)
.addParameter(paramsBuilderClass(), "params");
opModel.getStaticContextParams().forEach((n, m) -> {
String setterName = endpointRulesSpecUtils.paramMethodName(n);
TreeNode value = m.getValue();
switch (value.asToken()) {
case VALUE_STRING:
b.addStatement("params.$N($S)", setterName, ((JrsString) value).getValue());
break;
case VALUE_TRUE:
case VALUE_FALSE:
b.addStatement("params.$N($L)", setterName, ((JrsBoolean) value).booleanValue());
break;
default:
throw new RuntimeException("Don't know how to set parameter of type " + value.asToken());
}
});
return b.build();
}
private String staticContextParamsMethodName(OperationModel opModel) {
return opModel.getMethodName() + "StaticContextParams";
}
private boolean hasStaticContextParams(OperationModel opModel) {
Map<String, StaticContextParam> staticContextParams = opModel.getStaticContextParams();
return staticContextParams != null && !staticContextParams.isEmpty();
}
private void addStaticContextParamMethods(TypeSpec.Builder classBuilder) {
Map<String, OperationModel> operations = model.getOperations();
operations.forEach((n, m) -> {
if (hasStaticContextParams(m)) {
classBuilder.addMethod(addStaticContextParamsMethod(m));
}
});
}
private void addContextParamMethods(TypeSpec.Builder classBuilder) {
Map<String, OperationModel> operations = model.getOperations();
operations.forEach((n, m) -> {
if (hasContextParams(m)) {
classBuilder.addMethod(setContextParamsMethod(m));
}
});
}
private MethodSpec setStaticContextParamsMethod() {
Map<String, OperationModel> operations = model.getOperations();
MethodSpec.Builder b = MethodSpec.methodBuilder("setStaticContextParams")
.addModifiers(Modifier.PRIVATE, Modifier.STATIC)
.addParameter(paramsBuilderClass(), "params")
.addParameter(String.class, "operationName")
.returns(void.class);
b.beginControlFlow("switch (operationName)");
operations.forEach((n, m) -> {
if (!hasStaticContextParams(m)) {
return;
}
b.addCode("case $S:", n);
b.addStatement("$N(params)", staticContextParamsMethodName(m));
b.addStatement("break");
});
b.addCode("default:");
b.addStatement("break");
b.endControlFlow();
return b.build();
}
private MethodSpec setContextParams() {
Map<String, OperationModel> operations = model.getOperations();
MethodSpec.Builder b = MethodSpec.methodBuilder("setContextParams")
.addModifiers(Modifier.PRIVATE, Modifier.STATIC)
.addParameter(paramsBuilderClass(), "params")
.addParameter(String.class, "operationName")
.addParameter(SdkRequest.class, "request")
.returns(void.class);
b.beginControlFlow("switch (operationName)");
operations.forEach((n, m) -> {
if (!hasContextParams(m)) {
return;
}
String requestClassName = model.getNamingStrategy().getRequestClassName(m.getOperationName());
ClassName requestClass = poetExtension.getModelClass(requestClassName);
b.addCode("case $S:", n);
b.addStatement("setContextParams(params, ($T) request)", requestClass);
b.addStatement("break");
});
b.addCode("default:");
b.addStatement("break");
b.endControlFlow();
return b.build();
}
private MethodSpec setContextParamsMethod(OperationModel opModel) {
String requestClassName = model.getNamingStrategy().getRequestClassName(opModel.getOperationName());
ClassName requestClass = poetExtension.getModelClass(requestClassName);
MethodSpec.Builder b = MethodSpec.methodBuilder("setContextParams")
.addModifiers(Modifier.PRIVATE, Modifier.STATIC)
.addParameter(paramsBuilderClass(), "params")
.addParameter(requestClass, "request")
.returns(void.class);
opModel.getInputShape().getMembers().forEach(m -> {
ContextParam param = m.getContextParam();
if (param == null) {
return;
}
String setterName = endpointRulesSpecUtils.paramMethodName(param.getName());
b.addStatement("params.$N(request.$N())", setterName, m.getFluentGetterMethodName());
});
return b.build();
}
private boolean hasContextParams(OperationModel opModel) {
return opModel.getInputShape().getMembers().stream()
.anyMatch(m -> m.getContextParam() != null);
}
private boolean hasClientContextParams() {
Map<String, ClientContextParam> clientContextParams = model.getClientContextParams();
return clientContextParams != null && !clientContextParams.isEmpty();
}
private MethodSpec setClientContextParamsMethod() {
MethodSpec.Builder b = MethodSpec.methodBuilder("setClientContextParams")
.addModifiers(Modifier.PRIVATE, Modifier.STATIC)
.addParameter(paramsBuilderClass(), "params")
.addParameter(ExecutionAttributes.class, "executionAttributes")
.returns(void.class);
b.addStatement("$T clientContextParams = executionAttributes.getAttribute($T.CLIENT_CONTEXT_PARAMS)",
AttributeMap.class, SdkInternalExecutionAttribute.class);
ClassName paramsClass = endpointRulesSpecUtils.clientContextParamsName();
Map<String, ClientContextParam> params = model.getClientContextParams();
params.forEach((n, m) -> {
String attrName = endpointRulesSpecUtils.clientContextParamName(n);
b.addStatement("$T.ofNullable(clientContextParams.get($T.$N)).ifPresent(params::$N)", Optional.class, paramsClass,
attrName,
endpointRulesSpecUtils.paramMethodName(n));
});
return b.build();
}
}