fix: Allow custom HttpRules for REST LROs #1288
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@@ -38,4 +38,4 @@ for gapic-generator-java's Bazel build. | |
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| ```sh | ||
| mvn fmt:format | ||
| ``` | ||
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| Original file line number | Diff line number | Diff line change |
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@@ -14,6 +14,7 @@ | |
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| package com.google.api.generator.gapic.composer.rest; | ||
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| import com.google.api.HttpRule; | ||
| import com.google.api.core.InternalApi; | ||
| import com.google.api.gax.httpjson.ApiMethodDescriptor; | ||
| import com.google.api.gax.httpjson.ApiMethodDescriptor.MethodType; | ||
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@@ -63,6 +64,7 @@ | |
| import com.google.common.annotations.VisibleForTesting; | ||
| import com.google.common.collect.BiMap; | ||
| import com.google.common.collect.ImmutableList; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import com.google.protobuf.TypeRegistry; | ||
| import java.util.ArrayList; | ||
| import java.util.Arrays; | ||
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@@ -73,10 +75,10 @@ | |
| import java.util.Set; | ||
| import java.util.function.BiFunction; | ||
| import java.util.function.Function; | ||
| import java.util.function.Predicate; | ||
| import java.util.stream.Collectors; | ||
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| public class HttpJsonServiceStubClassComposer extends AbstractTransportServiceStubClassComposer { | ||
| private static final HttpJsonServiceStubClassComposer INSTANCE = | ||
| new HttpJsonServiceStubClassComposer(); | ||
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@@ -89,6 +91,7 @@ public class HttpJsonServiceStubClassComposer extends AbstractTransportServiceSt | |
| .setType(FIXED_REST_TYPESTORE.get(TypeRegistry.class.getSimpleName())) | ||
| .build()) | ||
| .build(); | ||
| private static final String LRO_NAME_PREFIX = "google.longrunning.Operations"; | ||
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| protected HttpJsonServiceStubClassComposer() { | ||
| super(RestContext.instance()); | ||
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@@ -109,7 +112,9 @@ private static TypeStore createStaticTypes() { | |
| HttpJsonCallSettings.class, | ||
| HttpJsonOperationSnapshot.class, | ||
| HttpJsonStubCallableFactory.class, | ||
| HttpRule.class, | ||
| Map.class, | ||
| ImmutableMap.class, | ||
| ProtoMessageRequestFormatter.class, | ||
| ProtoMessageResponseParser.class, | ||
| ProtoRestSerializer.class, | ||
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@@ -1075,6 +1080,7 @@ private List<Expr> getMethodTypeExpr(Method protoMethod) { | |
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| @Override | ||
| protected List<Expr> createOperationsStubInitExpr( | ||
| GapicContext context, | ||
| Service service, | ||
| Expr thisExpr, | ||
| VariableExpr operationsStubClassVarExpr, | ||
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@@ -1089,6 +1095,47 @@ protected List<Expr> createOperationsStubInitExpr( | |
| arguments.add(TYPE_REGISTRY_VAR_EXPR); | ||
| } | ||
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| // If the Service contains custom HttpRules for Operations, we pass a map of the custom rules to | ||
| // the Operations Client | ||
| Map<String, HttpRule> operationCustomHttpRules = parseOperationsCustomHttpRules(context); | ||
| if (operationCustomHttpRules.size() > 0) { | ||
| Expr operationCustomHttpBindingsBuilderExpr = | ||
| MethodInvocationExpr.builder() | ||
| .setStaticReferenceType(FIXED_REST_TYPESTORE.get(ImmutableMap.class.getSimpleName())) | ||
| .setMethodName("builder") | ||
| .setGenerics( | ||
| Arrays.asList( | ||
| TypeNode.STRING.reference(), | ||
| FIXED_REST_TYPESTORE.get(HttpRule.class.getSimpleName()).reference())) | ||
| .build(); | ||
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| // Sorting is done to ensure consistent ordering of the entries in the Custom HttpRule Map | ||
| for (String selector : | ||
| operationCustomHttpRules.keySet().stream().sorted().collect(Collectors.toList())) { | ||
| HttpRule httpRule = operationCustomHttpRules.get(selector); | ||
| Expr httpRuleBuilderExpr = createHttpRuleExpr(httpRule, true); | ||
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| operationCustomHttpBindingsBuilderExpr = | ||
| MethodInvocationExpr.builder() | ||
| .setExprReferenceExpr(operationCustomHttpBindingsBuilderExpr) | ||
| .setMethodName("put") | ||
| .setArguments( | ||
| Arrays.asList( | ||
| ValueExpr.withValue(StringObjectValue.withValue(selector)), | ||
| httpRuleBuilderExpr)) | ||
| .build(); | ||
| } | ||
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| operationCustomHttpBindingsBuilderExpr = | ||
| MethodInvocationExpr.builder() | ||
| .setExprReferenceExpr(operationCustomHttpBindingsBuilderExpr) | ||
| .setMethodName("build") | ||
| .setReturnType(FIXED_REST_TYPESTORE.get(ImmutableMap.class.getSimpleName())) | ||
| .build(); | ||
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| arguments.add(operationCustomHttpBindingsBuilderExpr); | ||
| } | ||
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| return Collections.singletonList( | ||
| AssignmentExpr.builder() | ||
| .setVariableExpr( | ||
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@@ -1103,6 +1150,73 @@ protected List<Expr> createOperationsStubInitExpr( | |
| .build()); | ||
| } | ||
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| /* Build an Expr that creates an HttpRule. Creates a builder and adds the http verb, custom path, and any additional bindings. `additional_bindings` can only be nested one layer deep, so we only check once */ | ||
| private Expr createHttpRuleExpr(HttpRule httpRule, boolean checkAdditionalBindings) { | ||
| Expr httpRuleBuilderExpr = | ||
| MethodInvocationExpr.builder() | ||
| .setStaticReferenceType(FIXED_REST_TYPESTORE.get(HttpRule.class.getSimpleName())) | ||
| .setMethodName("newBuilder") | ||
| .build(); | ||
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| httpRuleBuilderExpr = | ||
| MethodInvocationExpr.builder() | ||
| .setExprReferenceExpr(httpRuleBuilderExpr) | ||
| // toLowerCase as the PatternCase result is all uppercase | ||
| .setMethodName(setMethodFormat(httpRule.getPatternCase().toString().toLowerCase())) | ||
| .setArguments( | ||
| ValueExpr.withValue( | ||
| StringObjectValue.withValue(getOperationsURIValueFromHttpRule(httpRule)))) | ||
| .setReturnType(FIXED_REST_TYPESTORE.get(HttpRule.class.getSimpleName())) | ||
| .build(); | ||
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| if (checkAdditionalBindings) { | ||
| for (HttpRule additionalBindings : httpRule.getAdditionalBindingsList()) { | ||
| httpRuleBuilderExpr = | ||
| MethodInvocationExpr.builder() | ||
| .setExprReferenceExpr(httpRuleBuilderExpr) | ||
| .setMethodName("addAdditionalBindings") | ||
| .setArguments(Arrays.asList(createHttpRuleExpr(additionalBindings, false))) | ||
| .build(); | ||
| } | ||
| } | ||
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| httpRuleBuilderExpr = | ||
| MethodInvocationExpr.builder() | ||
| .setExprReferenceExpr(httpRuleBuilderExpr) | ||
| .setMethodName("build") | ||
| .setReturnType(FIXED_REST_TYPESTORE.get(HttpRule.class.getSimpleName())) | ||
| .build(); | ||
| return httpRuleBuilderExpr; | ||
| } | ||
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| /* Parses the Service Yaml file's for custom HttpRules. Filter the HttpRules for ones that match Operations */ | ||
| Map<String, HttpRule> parseOperationsCustomHttpRules(GapicContext context) { | ||
| Predicate<HttpRule> predicate = x -> x.getSelector().contains(LRO_NAME_PREFIX); | ||
| com.google.api.Service service = context.serviceYamlProto(); | ||
| if (service == null || service.getHttp() == null) { | ||
| return ImmutableMap.of(); | ||
| } | ||
| return service.getHttp().getRulesList().stream() | ||
| .filter(predicate) | ||
| .collect(Collectors.toMap(HttpRule::getSelector, x -> x)); | ||
| } | ||
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| /* This is meant to be used for the OperationsClient Mixin OperationsClient's RPCs are mapped to GET/POST/DELETE and this function only expects those HttpVerbs to be used */ | ||
| String getOperationsURIValueFromHttpRule(HttpRule httpRule) { | ||
| switch (httpRule.getPatternCase().getNumber()) { | ||
| case 2: | ||
| return httpRule.getGet(); | ||
| case 4: | ||
| return httpRule.getPost(); | ||
| case 5: | ||
| return httpRule.getDelete(); | ||
| default: | ||
| throw new IllegalArgumentException( | ||
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There was a problem hiding this comment. I would probably write some true unit tests for this method and the method above, as the input and output are very easy to mock and verify, but I know they are mostly already covered in the golden unit tests, so as long as we covered all the cases, it's fine to me. There was a problem hiding this comment.
I'm a bit lost of this part. The Echo goldens for rest should have it right? |
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| "Operations HttpRule should only contain GET/POST/DELETE. Invalid: " | ||
| + httpRule.getSelector()); | ||
| } | ||
| } | ||
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| @Override | ||
| protected List<Statement> createLongRunningClient(Service service, TypeStore typeStore) { | ||
| Method pollingMethod = service.operationPollingMethod(); | ||
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It would be good if we can provide a reference to the http proto for these mappings.
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I'll remember to add it in later. I'm not sure if this is the best approach yet, so I haven't been adding any docs or tests yet.