Add thread-pool implementation to read byte stream #3
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| /* | ||
| * Copyright (c) 2024, WSO2 LLC. (https://www.wso2.com). | ||
| * | ||
| * WSO2 LLC. licenses this file to you 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 io.ballerina.stdlib.data.xmldata.io; | ||
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| import io.ballerina.runtime.api.Environment; | ||
| import io.ballerina.runtime.api.Future; | ||
| import io.ballerina.runtime.api.types.MethodType; | ||
| import io.ballerina.runtime.api.types.ObjectType; | ||
| import io.ballerina.runtime.api.utils.TypeUtils; | ||
| import io.ballerina.runtime.api.values.BObject; | ||
| import io.ballerina.runtime.api.values.BTypedesc; | ||
| import io.ballerina.stdlib.data.xmldata.utils.DiagnosticErrorCode; | ||
| import io.ballerina.stdlib.data.xmldata.utils.DiagnosticLog; | ||
| import io.ballerina.stdlib.data.xmldata.xml.XmlParser; | ||
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| import java.io.InputStreamReader; | ||
| import java.util.function.Consumer; | ||
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| /** | ||
| * This class will read data from a Ballerina Stream of byte blocks, in non-blocking manner. | ||
| * | ||
| * @since 0.1.0 | ||
| */ | ||
| public class DataReaderTask implements Runnable { | ||
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| private static final String METHOD_NAME_NEXT = "next"; | ||
| private static final String METHOD_NAME_CLOSE = "close"; | ||
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| private final Environment env; | ||
| private final BObject iteratorObj; | ||
| private final Future future; | ||
| private final BTypedesc typed; | ||
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| public DataReaderTask(Environment env, BObject iteratorObj, Future future, BTypedesc typed) { | ||
| this.env = env; | ||
| this.iteratorObj = iteratorObj; | ||
| this.future = future; | ||
| this.typed = typed; | ||
| } | ||
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| static MethodType resolveNextMethod(BObject iterator) { | ||
| MethodType method = getMethodType(iterator, METHOD_NAME_NEXT); | ||
| if (method != null) { | ||
| return method; | ||
| } | ||
| throw new IllegalStateException("next method not found in the iterator object"); | ||
| } | ||
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| static MethodType resolveCloseMethod(BObject iterator) { | ||
| return getMethodType(iterator, METHOD_NAME_CLOSE); | ||
| } | ||
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| private static MethodType getMethodType(BObject iterator, String methodName) { | ||
| ObjectType objectType = (ObjectType) TypeUtils.getReferredType(iterator.getOriginalType()); | ||
| MethodType[] methods = objectType.getMethods(); | ||
| // Assumes compile-time validation of the iterator object | ||
| for (MethodType method : methods) { | ||
| if (method.getName().equals(methodName)) { | ||
| return method; | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
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| @Override | ||
| public void run() { | ||
| DataReaderTask.ResultConsumer<Object> resultConsumer = new DataReaderTask.ResultConsumer<>(future); | ||
| try (var byteBlockSteam = new BallerinaByteBlockInputStream(env, iteratorObj, resolveNextMethod(iteratorObj), | ||
| resolveCloseMethod(iteratorObj), resultConsumer)) { | ||
| Object result = XmlParser.parse(new InputStreamReader(byteBlockSteam), typed.getDescribingType()); | ||
| future.complete(result); | ||
| } catch (Exception e) { | ||
| future.complete(DiagnosticLog.error(DiagnosticErrorCode.STREAM_BROKEN, e.getMessage())); | ||
| } | ||
| } | ||
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| /** | ||
| * This class will hold module related utility functions. | ||
| * | ||
| * @param <T> The type of the result | ||
| * @param future The future to complete | ||
| * @since 0.1.0 | ||
| */ | ||
| public record ResultConsumer<T>(Future future) implements Consumer<T> { | ||
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| @Override | ||
| public void accept(T t) { | ||
| future.complete(t); | ||
| } | ||
|
Check warning on line 104 in native/src/main/java/io/ballerina/stdlib/data/xmldata/io/DataReaderTask.java
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| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| /* | ||
| * Copyright (c) 2024, WSO2 LLC. (https://www.wso2.com). | ||
| * | ||
| * WSO2 LLC. licenses this file to you 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 io.ballerina.stdlib.data.xmldata.io; | ||
|
|
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| import java.util.concurrent.ExecutorService; | ||
| import java.util.concurrent.SynchronousQueue; | ||
| import java.util.concurrent.ThreadFactory; | ||
| import java.util.concurrent.ThreadPoolExecutor; | ||
| import java.util.concurrent.TimeUnit; | ||
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| /** | ||
| * Thread pool for data reader. | ||
| * | ||
| * @since 0.1.0 | ||
| */ | ||
| public class DataReaderThreadPool { | ||
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| // TODO : Make this configurable, in Ballerina Library. | ||
| public static final ExecutorService EXECUTOR_SERVICE = new ThreadPoolExecutor(0, 20, 60L, TimeUnit.SECONDS, | ||
| new SynchronousQueue<>(), | ||
| new DataThreadFactory()); | ||
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| /** | ||
| * Thread factory for data reader. | ||
| */ | ||
| static class DataThreadFactory implements ThreadFactory { | ||
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| @Override | ||
| public Thread newThread(Runnable runnable) { | ||
| Thread balThread = new Thread(runnable); | ||
| balThread.setName("bal-data-xmldata-thread"); | ||
| return balThread; | ||
| } | ||
| } | ||
| } | ||
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if this is along with the repo name, better to make it a constant as well.