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Allow Besu to host RPC endpoints via a plugin. (hyperledger#2754)
This is a re-implementation of the initial POC done in PegaSysEng/pantheon#1909 by Danno Ferrin <[email protected]> * Only enable plugin rpc api when enabled on --rpc-http-api or --rpc-ws-apis * Only allow new rpc endpoints to be defined Signed-off-by: Antony Denyer <[email protected]>
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72
...test-plugins/src/main/java/org/hyperledger/besu/plugins/TestRpcEndpointServicePlugin.java
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| /* | ||
| * Copyright Hyperledger Besu Contributors. | ||
| * | ||
| * 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. | ||
| * | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
| package org.hyperledger.besu.plugins; | ||
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| import static com.google.common.base.Preconditions.checkArgument; | ||
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| import org.hyperledger.besu.plugin.BesuContext; | ||
| import org.hyperledger.besu.plugin.BesuPlugin; | ||
| import org.hyperledger.besu.plugin.services.RpcEndpointService; | ||
| import org.hyperledger.besu.plugin.services.rpc.PluginRpcRequest; | ||
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| import java.util.concurrent.atomic.AtomicReference; | ||
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| import com.google.auto.service.AutoService; | ||
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| @AutoService(BesuPlugin.class) | ||
| public class TestRpcEndpointServicePlugin implements BesuPlugin { | ||
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| private final AtomicReference<String> stringStorage = new AtomicReference<>("InitialValue"); | ||
| private final AtomicReference<Object[]> arrayStorage = new AtomicReference<>(); | ||
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| private String setValue(final PluginRpcRequest request) { | ||
| checkArgument(request.getParams().length == 1, "Only one parameter accepted"); | ||
| return stringStorage.updateAndGet(x -> request.getParams()[0].toString()); | ||
| } | ||
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| private String getValue(final PluginRpcRequest request) { | ||
| return stringStorage.get(); | ||
| } | ||
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| private Object[] replaceValueList(final PluginRpcRequest request) { | ||
| return arrayStorage.updateAndGet(x -> request.getParams()); | ||
| } | ||
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| private String throwException(final PluginRpcRequest request) { | ||
| throw new RuntimeException("Kaboom"); | ||
| } | ||
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| @Override | ||
| public void register(final BesuContext context) { | ||
| context | ||
| .getService(RpcEndpointService.class) | ||
| .ifPresent( | ||
| rpcEndpointService -> { | ||
| rpcEndpointService.registerRPCEndpoint("tests", "getValue", this::getValue); | ||
| rpcEndpointService.registerRPCEndpoint("tests", "setValue", this::setValue); | ||
| rpcEndpointService.registerRPCEndpoint( | ||
| "tests", "replaceValueList", this::replaceValueList); | ||
| rpcEndpointService.registerRPCEndpoint( | ||
| "tests", "throwException", this::throwException); | ||
| rpcEndpointService.registerRPCEndpoint("notEnabled", "getValue", this::getValue); | ||
| }); | ||
| } | ||
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| @Override | ||
| public void start() {} | ||
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| @Override | ||
| public void stop() {} | ||
| } |
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