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feat: add REST interceptors infrastructure (#1607)
The added interceptors infrastructure mimics the one from gRPC.
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88
gax-httpjson/src/main/java/com/google/api/gax/httpjson/ForwardingHttpJsonClientCall.java
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| /* | ||
| * Copyright 2022 Google LLC | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions are | ||
| * met: | ||
| * | ||
| * * Redistributions of source code must retain the above copyright | ||
| * notice, this list of conditions and the following disclaimer. | ||
| * * Redistributions in binary form must reproduce the above | ||
| * copyright notice, this list of conditions and the following disclaimer | ||
| * in the documentation and/or other materials provided with the | ||
| * distribution. | ||
| * * Neither the name of Google LLC nor the names of its | ||
| * contributors may be used to endorse or promote products derived from | ||
| * this software without specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | ||
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
| package com.google.api.gax.httpjson; | ||
|
|
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| import com.google.api.core.BetaApi; | ||
| import javax.annotation.Nullable; | ||
|
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| /** | ||
| * A {@link HttpJsonClientCall} which forwards all of its methods to another {@link | ||
| * HttpJsonClientCall}. | ||
| */ | ||
| @BetaApi | ||
| public abstract class ForwardingHttpJsonClientCall<RequestT, ResponseT> | ||
| extends HttpJsonClientCall<RequestT, ResponseT> { | ||
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| protected abstract HttpJsonClientCall<RequestT, ResponseT> delegate(); | ||
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| @Override | ||
| public void start(Listener<ResponseT> responseListener, HttpJsonMetadata requestHeaders) { | ||
| delegate().start(responseListener, requestHeaders); | ||
| } | ||
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| @Override | ||
| public void request(int numMessages) { | ||
| delegate().request(numMessages); | ||
| } | ||
|
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| @Override | ||
| public void cancel(@Nullable String message, @Nullable Throwable cause) { | ||
| delegate().cancel(message, cause); | ||
| } | ||
|
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| @Override | ||
| public void halfClose() { | ||
| delegate().halfClose(); | ||
| } | ||
|
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| @Override | ||
| public void sendMessage(RequestT message) { | ||
| delegate().sendMessage(message); | ||
| } | ||
|
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| /** | ||
| * A simplified version of {@link ForwardingHttpJsonClientCall} where subclasses can pass in a | ||
| * {@link HttpJsonClientCall} as the delegate. | ||
| */ | ||
| public abstract static class SimpleForwardingHttpJsonClientCall<RequestT, ResponseT> | ||
| extends ForwardingHttpJsonClientCall<RequestT, ResponseT> { | ||
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| private final HttpJsonClientCall<RequestT, ResponseT> delegate; | ||
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| protected SimpleForwardingHttpJsonClientCall(HttpJsonClientCall<RequestT, ResponseT> delegate) { | ||
| this.delegate = delegate; | ||
| } | ||
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| @Override | ||
| protected HttpJsonClientCall<RequestT, ResponseT> delegate() { | ||
| return delegate; | ||
| } | ||
| } | ||
| } |
79 changes: 79 additions & 0 deletions
79
...pjson/src/main/java/com/google/api/gax/httpjson/ForwardingHttpJsonClientCallListener.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| /* | ||
| * Copyright 2022 Google LLC | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions are | ||
| * met: | ||
| * | ||
| * * Redistributions of source code must retain the above copyright | ||
| * notice, this list of conditions and the following disclaimer. | ||
| * * Redistributions in binary form must reproduce the above | ||
| * copyright notice, this list of conditions and the following disclaimer | ||
| * in the documentation and/or other materials provided with the | ||
| * distribution. | ||
| * * Neither the name of Google LLC nor the names of its | ||
| * contributors may be used to endorse or promote products derived from | ||
| * this software without specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | ||
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
|
|
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| package com.google.api.gax.httpjson; | ||
|
|
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| import com.google.api.core.BetaApi; | ||
|
|
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| /** | ||
| * A {@link HttpJsonClientCall.Listener} which forwards all of its methods to another {@link | ||
| * HttpJsonClientCall.Listener}. | ||
| */ | ||
| @BetaApi | ||
| public abstract class ForwardingHttpJsonClientCallListener<ResponseT> | ||
| extends HttpJsonClientCall.Listener<ResponseT> { | ||
|
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| protected abstract HttpJsonClientCall.Listener<ResponseT> delegate(); | ||
|
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| @Override | ||
| public void onHeaders(HttpJsonMetadata responseHeaders) { | ||
| delegate().onHeaders(responseHeaders); | ||
| } | ||
|
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| @Override | ||
| public void onMessage(ResponseT message) { | ||
| delegate().onMessage(message); | ||
| } | ||
|
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| @Override | ||
| public void onClose(int statusCode, HttpJsonMetadata trailers) { | ||
| delegate().onClose(statusCode, trailers); | ||
| } | ||
|
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| /** | ||
| * A simplified version of {@link ForwardingHttpJsonClientCallListener} where subclasses can pass | ||
| * in a {@link HttpJsonClientCall.Listener} as the delegate. | ||
| */ | ||
| public abstract static class SimpleForwardingHttpJsonClientCallListener<ResponseT> | ||
| extends ForwardingHttpJsonClientCallListener<ResponseT> { | ||
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| private final HttpJsonClientCall.Listener<ResponseT> delegate; | ||
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| protected SimpleForwardingHttpJsonClientCallListener( | ||
| HttpJsonClientCall.Listener<ResponseT> delegate) { | ||
| this.delegate = delegate; | ||
| } | ||
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| @Override | ||
| protected HttpJsonClientCall.Listener<ResponseT> delegate() { | ||
| return delegate; | ||
| } | ||
| } | ||
| } |
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55 changes: 55 additions & 0 deletions
55
gax-httpjson/src/main/java/com/google/api/gax/httpjson/HttpJsonClientInterceptor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| /* | ||
| * Copyright 2022 Google LLC | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions are | ||
| * met: | ||
| * | ||
| * * Redistributions of source code must retain the above copyright | ||
| * notice, this list of conditions and the following disclaimer. | ||
| * * Redistributions in binary form must reproduce the above | ||
| * copyright notice, this list of conditions and the following disclaimer | ||
| * in the documentation and/or other materials provided with the | ||
| * distribution. | ||
| * * Neither the name of Google LLC nor the names of its | ||
| * contributors may be used to endorse or promote products derived from | ||
| * this software without specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | ||
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
| package com.google.api.gax.httpjson; | ||
|
|
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| import com.google.api.core.BetaApi; | ||
|
|
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| /** | ||
| * Interface for intercepting outgoing calls before they are dispatched by a {@link | ||
| * HttpJsonChannel}. | ||
| * | ||
| * <p>The interceptor may be called for multiple {@link HttpJsonClientCall calls} by one or more | ||
| * threads without completing the previous ones first. The implementations must be thread-safe. | ||
| */ | ||
| @BetaApi | ||
| public interface HttpJsonClientInterceptor { | ||
| /** | ||
| * Intercept {@link HttpJsonClientCall} creation by the {@code next} {@link HttpJsonChannel}. | ||
| * | ||
| * @param method the remote method to be called | ||
| * @param callOptions the runtime options to be applied to this call | ||
| * @param next the channel which is being intercepted | ||
| * @return the call object for the remote operation, never {@code null} | ||
| */ | ||
| <ReqT, RespT> HttpJsonClientCall<ReqT, RespT> interceptCall( | ||
| ApiMethodDescriptor<ReqT, RespT> method, | ||
| HttpJsonCallOptions callOptions, | ||
| HttpJsonChannel next); | ||
| } |
69 changes: 69 additions & 0 deletions
69
gax-httpjson/src/main/java/com/google/api/gax/httpjson/HttpJsonHeaderInterceptor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| /* | ||
| * Copyright 2022 Google LLC | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions are | ||
| * met: | ||
| * | ||
| * * Redistributions of source code must retain the above copyright | ||
| * notice, this list of conditions and the following disclaimer. | ||
| * * Redistributions in binary form must reproduce the above | ||
| * copyright notice, this list of conditions and the following disclaimer | ||
| * in the documentation and/or other materials provided with the | ||
| * distribution. | ||
| * * Neither the name of Google LLC nor the names of its | ||
| * contributors may be used to endorse or promote products derived from | ||
| * this software without specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | ||
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | ||
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
| package com.google.api.gax.httpjson; | ||
|
|
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| import com.google.api.gax.httpjson.ForwardingHttpJsonClientCall.SimpleForwardingHttpJsonClientCall; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import java.util.Map; | ||
|
|
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| /** | ||
| * An interceptor to handle custom headers. | ||
| * | ||
| * <p>Package-private for internal usage. | ||
| */ | ||
| class HttpJsonHeaderInterceptor implements HttpJsonClientInterceptor { | ||
|
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| private final Map<String, String> staticHeaders; | ||
|
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| public HttpJsonHeaderInterceptor(Map<String, String> staticHeaders) { | ||
| this.staticHeaders = staticHeaders; | ||
| } | ||
|
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| @Override | ||
| public <ReqT, RespT> HttpJsonClientCall<ReqT, RespT> interceptCall( | ||
| ApiMethodDescriptor<ReqT, RespT> method, | ||
| final HttpJsonCallOptions callOptions, | ||
| HttpJsonChannel next) { | ||
| HttpJsonClientCall<ReqT, RespT> call = next.newCall(method, callOptions); | ||
| return new SimpleForwardingHttpJsonClientCall<ReqT, RespT>(call) { | ||
| @Override | ||
| public void start( | ||
| HttpJsonClientCall.Listener<RespT> responseListener, HttpJsonMetadata headers) { | ||
| Map<String, Object> mergedHeaders = | ||
| ImmutableMap.<String, Object>builder() | ||
| .putAll(headers.getHeaders()) | ||
| .putAll(staticHeaders) | ||
| .build(); | ||
|
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| super.start(responseListener, headers.toBuilder().setHeaders(mergedHeaders).build()); | ||
| } | ||
| }; | ||
| } | ||
| } |
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