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Add ExternalReaderRuntime, lots of test coverage
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29 changes: 29 additions & 0 deletions
29
pkl-core/src/main/java/org/pkl/core/externalProcess/ExternalModuleReader.java
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|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| /** | ||
| * Copyright © 2024 Apple Inc. and the Pkl project authors. 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. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://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 org.pkl.core.externalProcess; | ||
|
|
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| import java.net.URI; | ||
| import org.pkl.core.messaging.Messages.ModuleReaderSpec; | ||
|
|
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| public interface ExternalModuleReader extends ExternalReaderBase { | ||
| boolean isLocal(); | ||
|
|
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| String read(URI uri) throws Exception; | ||
|
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| default ModuleReaderSpec getSpec() { | ||
| return new ModuleReaderSpec(getScheme(), hasHierarchicalUris(), isLocal(), isGlobbable()); | ||
| } | ||
| } |
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30 changes: 30 additions & 0 deletions
30
pkl-core/src/main/java/org/pkl/core/externalProcess/ExternalReaderBase.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,30 @@ | ||
| /** | ||
| * Copyright © 2024 Apple Inc. and the Pkl project authors. 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. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://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 org.pkl.core.externalProcess; | ||
|
|
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| import java.net.URI; | ||
| import java.util.List; | ||
| import org.pkl.core.module.PathElement; | ||
|
|
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| public interface ExternalReaderBase { | ||
| String getScheme(); | ||
|
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| boolean hasHierarchicalUris(); | ||
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| boolean isGlobbable(); | ||
|
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| List<PathElement> listElements(URI uri) throws Exception; | ||
| } |
191 changes: 191 additions & 0 deletions
191
pkl-core/src/main/java/org/pkl/core/externalProcess/ExternalReaderRuntime.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,191 @@ | ||
| /** | ||
| * Copyright © 2024 Apple Inc. and the Pkl project authors. 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. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://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 org.pkl.core.externalProcess; | ||
|
|
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| import java.io.IOException; | ||
| import java.util.List; | ||
| import org.pkl.core.externalProcess.ExternalProcessMessages.*; | ||
| import org.pkl.core.messaging.Message.Type; | ||
| import org.pkl.core.messaging.MessageTransport; | ||
| import org.pkl.core.messaging.Messages.*; | ||
| import org.pkl.core.messaging.ProtocolException; | ||
| import org.pkl.core.util.Nullable; | ||
|
|
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| public class ExternalReaderRuntime { | ||
|
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| private final List<ExternalModuleReader> moduleReaders; | ||
| private final List<ExternalResourceReader> resourceReaders; | ||
| private final MessageTransport transport; | ||
|
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| public ExternalReaderRuntime( | ||
| List<ExternalModuleReader> moduleReaders, | ||
| List<ExternalResourceReader> resourceReaders, | ||
| MessageTransport transport) { | ||
| this.moduleReaders = moduleReaders; | ||
| this.resourceReaders = resourceReaders; | ||
| this.transport = transport; | ||
| } | ||
|
|
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| public void close() { | ||
| transport.close(); | ||
| } | ||
|
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| private @Nullable ExternalModuleReader findModuleReader(String scheme) { | ||
| for (var moduleReader : moduleReaders) { | ||
| if (moduleReader.getScheme().equalsIgnoreCase(scheme)) { | ||
| return moduleReader; | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
|
|
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| private @Nullable ExternalResourceReader findResourceReader(String scheme) { | ||
| for (var resourceReader : resourceReaders) { | ||
| if (resourceReader.getScheme().equalsIgnoreCase(scheme)) { | ||
| return resourceReader; | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
|
|
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| public void run() throws ProtocolException, IOException { | ||
| transport.start( | ||
| (msg) -> { | ||
| if (msg.getType() == Type.CLOSE_EXTERNAL_PROCESS) { | ||
| close(); | ||
| } else { | ||
| throw new ProtocolException("Unexpected incoming one-way message: " + msg); | ||
| } | ||
| }, | ||
| (msg) -> { | ||
| switch (msg.getType()) { | ||
| case INITIALIZE_MODULE_READER_REQUEST -> { | ||
| var req = (InitializeModuleReaderRequest) msg; | ||
| var reader = findModuleReader(req.getScheme()); | ||
| @Nullable ModuleReaderSpec spec = null; | ||
| if (reader != null) { | ||
| spec = reader.getSpec(); | ||
| } | ||
| transport.send(new InitializeModuleReaderResponse(req.getRequestId(), spec)); | ||
| } | ||
| case INITIALIZE_RESOURCE_READER_REQUEST -> { | ||
| var req = (InitializeResourceReaderRequest) msg; | ||
| var reader = findResourceReader(req.getScheme()); | ||
| @Nullable ResourceReaderSpec spec = null; | ||
| if (reader != null) { | ||
| spec = reader.getSpec(); | ||
| } | ||
| transport.send(new InitializeResourceReaderResponse(req.getRequestId(), spec)); | ||
| } | ||
| case LIST_MODULES_REQUEST -> { | ||
| var req = (ListModulesRequest) msg; | ||
| var reader = findModuleReader(req.getUri().getScheme()); | ||
| if (reader == null) { | ||
| transport.send( | ||
| new ListModulesResponse( | ||
| req.getRequestId(), | ||
| req.getEvaluatorId(), | ||
| null, | ||
| "No module reader found for scheme " + req.getUri().getScheme())); | ||
| return; | ||
| } | ||
| try { | ||
| transport.send( | ||
| new ListModulesResponse( | ||
| req.getRequestId(), | ||
| req.getEvaluatorId(), | ||
| reader.listElements(req.getUri()), | ||
| null)); | ||
| } catch (Exception e) { | ||
| transport.send( | ||
| new ListModulesResponse( | ||
| req.getRequestId(), req.getEvaluatorId(), null, e.toString())); | ||
| } | ||
| } | ||
| case LIST_RESOURCES_REQUEST -> { | ||
| var req = (ListResourcesRequest) msg; | ||
| var reader = findModuleReader(req.getUri().getScheme()); | ||
| if (reader == null) { | ||
| transport.send( | ||
| new ListResourcesResponse( | ||
| req.getRequestId(), | ||
| req.getEvaluatorId(), | ||
| null, | ||
| "No resource reader found for scheme " + req.getUri().getScheme())); | ||
| return; | ||
| } | ||
| try { | ||
| transport.send( | ||
| new ListResourcesResponse( | ||
| req.getRequestId(), | ||
| req.getEvaluatorId(), | ||
| reader.listElements(req.getUri()), | ||
| null)); | ||
| } catch (Exception e) { | ||
| transport.send( | ||
| new ListResourcesResponse( | ||
| req.getRequestId(), req.getEvaluatorId(), null, e.toString())); | ||
| } | ||
| } | ||
| case READ_MODULE_REQUEST -> { | ||
| var req = (ReadModuleRequest) msg; | ||
| var reader = findModuleReader(req.getUri().getScheme()); | ||
| if (reader == null) { | ||
| transport.send( | ||
| new ReadModuleResponse( | ||
| req.getRequestId(), | ||
| req.getEvaluatorId(), | ||
| null, | ||
| "No module reader found for scheme " + req.getUri().getScheme())); | ||
| return; | ||
| } | ||
| try { | ||
| transport.send( | ||
| new ReadModuleResponse( | ||
| req.getRequestId(), req.getEvaluatorId(), reader.read(req.getUri()), null)); | ||
| } catch (Exception e) { | ||
| transport.send( | ||
| new ReadModuleResponse( | ||
| req.getRequestId(), req.getEvaluatorId(), null, e.toString())); | ||
| } | ||
| } | ||
| case READ_RESOURCE_REQUEST -> { | ||
| var req = (ReadResourceRequest) msg; | ||
| var reader = findResourceReader(req.getUri().getScheme()); | ||
| if (reader == null) { | ||
| transport.send( | ||
| new ReadResourceResponse( | ||
| req.getRequestId(), | ||
| req.getEvaluatorId(), | ||
| null, | ||
| "No resource reader found for scheme " + req.getUri().getScheme())); | ||
| return; | ||
| } | ||
| try { | ||
| transport.send( | ||
| new ReadResourceResponse( | ||
| req.getRequestId(), req.getEvaluatorId(), reader.read(req.getUri()), null)); | ||
| } catch (Exception e) { | ||
| transport.send( | ||
| new ReadResourceResponse( | ||
| req.getRequestId(), req.getEvaluatorId(), new byte[0], e.toString())); | ||
| } | ||
| } | ||
| default -> throw new ProtocolException("Unexpected incoming request message: " + msg); | ||
| } | ||
| }); | ||
| } | ||
| } |
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