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Merge pull request #237 from awslabs/waiter_impl
Adds waiter support to smithy-go
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132 changes: 132 additions & 0 deletions
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.../main/java/software/amazon/smithy/go/codegen/integration/OperationInterfaceGenerator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| /* | ||
| * Copyright 2020 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.smithy.go.codegen.integration; | ||
|
|
||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
| import java.util.Set; | ||
| import java.util.TreeSet; | ||
| import software.amazon.smithy.codegen.core.Symbol; | ||
| import software.amazon.smithy.codegen.core.SymbolProvider; | ||
| import software.amazon.smithy.go.codegen.GoDelegator; | ||
| import software.amazon.smithy.go.codegen.GoSettings; | ||
| import software.amazon.smithy.go.codegen.GoWriter; | ||
| import software.amazon.smithy.go.codegen.SmithyGoDependency; | ||
| import software.amazon.smithy.go.codegen.SymbolUtils; | ||
| import software.amazon.smithy.model.Model; | ||
| import software.amazon.smithy.model.knowledge.PaginatedIndex; | ||
| import software.amazon.smithy.model.knowledge.TopDownIndex; | ||
| import software.amazon.smithy.model.shapes.OperationShape; | ||
| import software.amazon.smithy.model.shapes.ServiceShape; | ||
| import software.amazon.smithy.model.shapes.ShapeId; | ||
| import software.amazon.smithy.waiters.WaitableTrait; | ||
|
|
||
| /** | ||
| * Generates API client Interfaces as per API operation. | ||
| */ | ||
| public class OperationInterfaceGenerator implements GoIntegration { | ||
|
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| private static Map<ShapeId, Set<ShapeId>> mapOfClientInterfaceOperations = new HashMap<>(); | ||
|
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| /** | ||
| * Returns name of an API client interface. | ||
| * | ||
| * @param operationSymbol Symbol of operation shape for which Api client interface is being generated. | ||
| * @return name of the interface. | ||
| */ | ||
| public static String getApiClientInterfaceName( | ||
| Symbol operationSymbol | ||
| ) { | ||
| return String.format("%sAPIClient", operationSymbol.getName()); | ||
| } | ||
|
|
||
| @Override | ||
| public void processFinalizedModel( | ||
| GoSettings settings, | ||
| Model model | ||
| ) { | ||
| ServiceShape serviceShape = settings.getService(model); | ||
| TopDownIndex topDownIndex = TopDownIndex.of(model); | ||
| PaginatedIndex paginatedIndex = PaginatedIndex.of(model); | ||
|
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| Set<ShapeId> listOfClientInterfaceOperations = new TreeSet<>(); | ||
|
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| // fetch operations for which paginators are generated | ||
| topDownIndex.getContainedOperations(serviceShape).stream() | ||
| .map(operationShape -> paginatedIndex.getPaginationInfo(serviceShape, operationShape)) | ||
| .filter(Optional::isPresent) | ||
| .map(Optional::get) | ||
| .forEach(paginationInfo -> listOfClientInterfaceOperations.add(paginationInfo.getOperation().getId())); | ||
|
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| // fetch operations for which waitable trait is applied | ||
| topDownIndex.getContainedOperations(serviceShape).stream() | ||
| .filter(operationShape -> operationShape.hasTrait(WaitableTrait.class)) | ||
| .forEach(operationShape -> listOfClientInterfaceOperations.add(operationShape.getId())); | ||
|
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| if (!listOfClientInterfaceOperations.isEmpty()) { | ||
| mapOfClientInterfaceOperations.put(serviceShape.getId(), listOfClientInterfaceOperations); | ||
| } | ||
| } | ||
|
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||
| @Override | ||
| public void writeAdditionalFiles( | ||
| GoSettings settings, | ||
| Model model, | ||
| SymbolProvider symbolProvider, | ||
| GoDelegator goDelegator | ||
| ) { | ||
| ShapeId serviceId = settings.getService(model).getId(); | ||
|
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| if (mapOfClientInterfaceOperations.containsKey(serviceId)) { | ||
| Set<ShapeId> listOfClientInterfaceOperations = mapOfClientInterfaceOperations.get(serviceId); | ||
| listOfClientInterfaceOperations.stream().forEach(shapeId -> { | ||
| OperationShape operationShape = model.expectShape(shapeId, OperationShape.class); | ||
| goDelegator.useShapeWriter(operationShape, writer -> { | ||
| generateApiClientInterface(writer, model, symbolProvider, operationShape); | ||
| }); | ||
| }); | ||
| } | ||
| } | ||
|
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| private void generateApiClientInterface( | ||
| GoWriter writer, | ||
| Model model, | ||
| SymbolProvider symbolProvider, | ||
| OperationShape operationShape | ||
| ) { | ||
| Symbol contextSymbol = SymbolUtils.createValueSymbolBuilder("Context", SmithyGoDependency.CONTEXT) | ||
| .build(); | ||
|
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| Symbol operationSymbol = symbolProvider.toSymbol(operationShape); | ||
|
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| Symbol interfaceSymbol = SymbolUtils.createValueSymbolBuilder(getApiClientInterfaceName(operationSymbol)) | ||
| .build(); | ||
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| Symbol inputSymbol = symbolProvider.toSymbol(model.expectShape(operationShape.getInput().get())); | ||
| Symbol outputSymbol = symbolProvider.toSymbol(model.expectShape(operationShape.getOutput().get())); | ||
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| writer.writeDocs(String.format("%s is a client that implements the %s operation.", | ||
| interfaceSymbol.getName(), operationSymbol.getName())); | ||
| writer.openBlock("type $T interface {", "}", interfaceSymbol, () -> { | ||
| writer.write("$L($T, $P, ...func(*Options)) ($P, error)", operationSymbol.getName(), contextSymbol, | ||
| inputSymbol, outputSymbol); | ||
| }); | ||
| writer.write(""); | ||
| writer.write("var _ $T = (*Client)(nil)", interfaceSymbol); | ||
| writer.write(""); | ||
| } | ||
| } |
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