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Add namespace manager to retrieve REST function signatures.
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26 changes: 26 additions & 0 deletions
26
...namespace-managers/src/main/java/com/facebook/presto/functionNamespace/ForRestServer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| /* | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License 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 com.facebook.presto.functionNamespace; | ||
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| import com.google.inject.BindingAnnotation; | ||
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| import java.lang.annotation.Retention; | ||
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| import static java.lang.annotation.RetentionPolicy.RUNTIME; | ||
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| @Retention(RUNTIME) | ||
| @BindingAnnotation | ||
| public @interface ForRestServer | ||
| { | ||
| } |
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30 changes: 30 additions & 0 deletions
30
...rc/main/java/com/facebook/presto/functionNamespace/rest/RestBasedCommunicationModule.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| /* | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License 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 com.facebook.presto.functionNamespace.rest; | ||
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| import com.facebook.presto.functionNamespace.ForRestServer; | ||
| import com.google.inject.Binder; | ||
| import com.google.inject.Module; | ||
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| import static com.facebook.airlift.http.client.HttpClientBinder.httpClientBinder; | ||
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| public class RestBasedCommunicationModule | ||
| implements Module | ||
| { | ||
| @Override | ||
| public void configure(Binder binder) | ||
| { | ||
| httpClientBinder(binder).bindHttpClient("restServer", ForRestServer.class); | ||
| } | ||
| } |
128 changes: 128 additions & 0 deletions
128
...agers/src/main/java/com/facebook/presto/functionNamespace/rest/RestBasedFunctionApis.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /* | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License 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 com.facebook.presto.functionNamespace.rest; | ||
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| import com.facebook.airlift.http.client.HttpClient; | ||
| import com.facebook.airlift.http.client.Request; | ||
| import com.facebook.airlift.http.client.StatusResponseHandler; | ||
| import com.facebook.airlift.json.JsonCodec; | ||
| import com.facebook.presto.functionNamespace.ForRestServer; | ||
| import com.facebook.presto.functionNamespace.JsonBasedUdfFunctionMetadata; | ||
| import com.facebook.presto.functionNamespace.UdfFunctionSignatureMap; | ||
| import com.facebook.presto.spi.PrestoException; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import com.google.inject.Inject; | ||
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| import java.net.URI; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| import static com.facebook.airlift.http.client.HttpUriBuilder.uriBuilderFrom; | ||
| import static com.facebook.airlift.http.client.JsonResponseHandler.createJsonResponseHandler; | ||
| import static com.facebook.presto.spi.StandardErrorCode.NOT_SUPPORTED; | ||
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| public class RestBasedFunctionApis | ||
| { | ||
| public static final String ALL_FUNCTIONS_ENDPOINT = "/v1/functions"; | ||
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| private final HttpClient httpClient; | ||
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| private final JsonCodec<Map<String, List<JsonBasedUdfFunctionMetadata>>> functionSignatureMapJsonCodec; | ||
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| private final RestBasedFunctionNamespaceManagerConfig managerConfig; | ||
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| @Inject | ||
| public RestBasedFunctionApis( | ||
| JsonCodec<Map<String, List<JsonBasedUdfFunctionMetadata>>> nativeFunctionSignatureMapJsonCodec, | ||
| @ForRestServer HttpClient httpClient, | ||
| RestBasedFunctionNamespaceManagerConfig managerConfig) | ||
| { | ||
| this.functionSignatureMapJsonCodec = nativeFunctionSignatureMapJsonCodec; | ||
| this.httpClient = httpClient; | ||
| this.managerConfig = managerConfig; | ||
| } | ||
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| public String getFunctionsETag() | ||
| { | ||
| try { | ||
| URI uri = uriBuilderFrom(URI.create(managerConfig.getRestUrl())) | ||
| .appendPath(ALL_FUNCTIONS_ENDPOINT) | ||
| .build(); | ||
| Request request = Request.builder() | ||
| .prepareHead() | ||
| .setUri(uri) | ||
| .build(); | ||
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| StatusResponseHandler.StatusResponse response = httpClient.execute(request, StatusResponseHandler.createStatusResponseHandler()); | ||
| String version = response.getHeader("ETag"); | ||
| if (version == null) { | ||
| throw new IllegalStateException("Failed to retrieve API version: 'ETag' header is missing"); | ||
| } | ||
| return version; | ||
| } | ||
| catch (Exception e) { | ||
| throw new IllegalStateException("Failed to get functions ETag from REST server, " + e.getMessage()); | ||
| } | ||
| } | ||
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| public UdfFunctionSignatureMap getAllFunctions() | ||
| { | ||
| return getFunctionsAt(ALL_FUNCTIONS_ENDPOINT); | ||
| } | ||
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| public UdfFunctionSignatureMap getFunctions(String schema) | ||
| { | ||
| return getFunctionsAt(ALL_FUNCTIONS_ENDPOINT + "/" + schema); | ||
| } | ||
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| public UdfFunctionSignatureMap getFunctions(String schema, String functionName) | ||
| { | ||
| return getFunctionsAt(ALL_FUNCTIONS_ENDPOINT + "/" + schema + "/" + functionName); | ||
| } | ||
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| public String addFunction(String schema, String functionName, JsonBasedUdfFunctionMetadata metadata) | ||
| { | ||
| throw new PrestoException(NOT_SUPPORTED, "Add Function is yet to be added"); | ||
| } | ||
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| public String updateFunction(String schema, String functionName, String functionId, JsonBasedUdfFunctionMetadata metadata) | ||
| { | ||
| throw new PrestoException(NOT_SUPPORTED, "Update Function is yet to be added"); | ||
| } | ||
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| public String deleteFunction(String schema, String functionName, String functionId) | ||
| { | ||
| throw new PrestoException(NOT_SUPPORTED, "Delete Function is yet to be added"); | ||
| } | ||
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| private UdfFunctionSignatureMap getFunctionsAt(String endpoint) | ||
| throws IllegalStateException | ||
| { | ||
| try { | ||
| URI uri = uriBuilderFrom(URI.create(managerConfig.getRestUrl())) | ||
| .appendPath(endpoint) | ||
| .build(); | ||
| Request request = Request.builder() | ||
| .prepareGet() | ||
| .setUri(uri) | ||
| .build(); | ||
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| Map<String, List<JsonBasedUdfFunctionMetadata>> nativeFunctionSignatureMap = httpClient.execute(request, createJsonResponseHandler(functionSignatureMapJsonCodec)); | ||
| return new UdfFunctionSignatureMap(ImmutableMap.copyOf(nativeFunctionSignatureMap)); | ||
| } | ||
| catch (Exception e) { | ||
| throw new IllegalStateException("Failed to get function definitions from REST server, " + e.getMessage()); | ||
| } | ||
| } | ||
| } |
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