Delegate creation of consensus-specific JSON-RPC methods to the PantheonController instead of using instanceof and casting. (#289)

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/jsonrpc/IbftJsonRpcMethodsFactory.java

@@ -34,7 +34,6 @@ public class IbftJsonRpcMethodsFactory {
     final Map<String, JsonRpcMethod> rpcMethods = new HashMap<>();
 
     if (jsonRpcApis.contains(IbftRpcApis.IBFT)) {
-      // @formatter:off
       addMethods(
           rpcMethods,
           new IbftProposeValidatorVote(

pantheon/src/main/java/tech/pegasys/pantheon/RunnerBuilder.java

@@ -12,10 +12,6 @@
  */
 package tech.pegasys.pantheon;
 
-import tech.pegasys.pantheon.consensus.clique.CliqueContext;
-import tech.pegasys.pantheon.consensus.clique.jsonrpc.CliqueJsonRpcMethodsFactory;
-import tech.pegasys.pantheon.consensus.ibft.IbftContext;
-import tech.pegasys.pantheon.consensus.ibft.jsonrpc.IbftJsonRpcMethodsFactory;
 import tech.pegasys.pantheon.controller.PantheonController;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
 import tech.pegasys.pantheon.ethereum.ProtocolContext;
@@ -155,6 +151,7 @@ public class RunnerBuilder {
           jsonRpcMethods(
               context,
               protocolSchedule,
+              pantheonController,
               networkRunner,
               synchronizer,
               transactionPool,
@@ -172,6 +169,7 @@ public class RunnerBuilder {
           jsonRpcMethods(
               context,
               protocolSchedule,
+              pantheonController,
               networkRunner,
               synchronizer,
               transactionPool,
@@ -216,6 +214,7 @@ public class RunnerBuilder {
   private Map<String, JsonRpcMethod> jsonRpcMethods(
       final ProtocolContext<?> context,
       final ProtocolSchedule<?> protocolSchedule,
+      final PantheonController<?> pantheonController,
       final NetworkRunner networkRunner,
       final Synchronizer synchronizer,
       final TransactionPool transactionPool,
@@ -237,22 +236,7 @@ public class RunnerBuilder {
                 supportedCapabilities,
                 jsonRpcApis,
                 filterManager);
-
-    if (context.getConsensusState() instanceof CliqueContext) {
-      // This is checked before entering this if branch
-      @SuppressWarnings("unchecked")
-      final ProtocolContext<CliqueContext> cliqueProtocolContext =
-          (ProtocolContext<CliqueContext>) context;
-      methods.putAll(new CliqueJsonRpcMethodsFactory().methods(cliqueProtocolContext, jsonRpcApis));
-    }
-
-    if (context.getConsensusState() instanceof IbftContext) {
-      // This is checked before entering this if branch
-      @SuppressWarnings("unchecked")
-      final ProtocolContext<IbftContext> ibftProtocolContext =
-          (ProtocolContext<IbftContext>) context;
-      methods.putAll(new IbftJsonRpcMethodsFactory().methods(ibftProtocolContext, jsonRpcApis));
-    }
+    methods.putAll(pantheonController.getAdditionalJsonRpcMethods(jsonRpcApis));
     return methods;
   }
 

pantheon/src/main/java/tech/pegasys/pantheon/controller/CliquePantheonController.java

@@ -23,6 +23,7 @@ import tech.pegasys.pantheon.consensus.clique.VoteTallyCache;
 import tech.pegasys.pantheon.consensus.clique.blockcreation.CliqueBlockScheduler;
 import tech.pegasys.pantheon.consensus.clique.blockcreation.CliqueMinerExecutor;
 import tech.pegasys.pantheon.consensus.clique.blockcreation.CliqueMiningCoordinator;
+import tech.pegasys.pantheon.consensus.clique.jsonrpc.CliqueJsonRpcMethodsFactory;
 import tech.pegasys.pantheon.consensus.common.EpochManager;
 import tech.pegasys.pantheon.consensus.common.VoteProposer;
 import tech.pegasys.pantheon.consensus.common.VoteTallyUpdater;
@@ -46,6 +47,8 @@ import tech.pegasys.pantheon.ethereum.eth.sync.SyncMode;
 import tech.pegasys.pantheon.ethereum.eth.sync.SynchronizerConfiguration;
 import tech.pegasys.pantheon.ethereum.eth.sync.state.SyncState;
 import tech.pegasys.pantheon.ethereum.eth.transactions.TransactionPoolFactory;
+import tech.pegasys.pantheon.ethereum.jsonrpc.RpcApi;
+import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.JsonRpcMethod;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.ProtocolManager;
 import tech.pegasys.pantheon.ethereum.p2p.config.SubProtocolConfiguration;
@@ -54,6 +57,8 @@ import tech.pegasys.pantheon.ethereum.worldstate.WorldStateStorage;
 
 import java.io.IOException;
 import java.time.Clock;
+import java.util.Collection;
+import java.util.Map;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
@@ -234,6 +239,12 @@ public class CliquePantheonController implements PantheonController<CliqueContex
     return miningCoordinator;
   }
 
+  @Override
+  public Map<String, JsonRpcMethod> getAdditionalJsonRpcMethods(
+      final Collection<RpcApi> enabledRpcApis) {
+    return new CliqueJsonRpcMethodsFactory().methods(context, enabledRpcApis);
+  }
+
   @Override
   public void close() {
     closer.run();

pantheon/src/main/java/tech/pegasys/pantheon/controller/IbftPantheonController.java

@@ -27,6 +27,7 @@ import tech.pegasys.pantheon.consensus.ibft.IbftProcessor;
 import tech.pegasys.pantheon.consensus.ibft.IbftStateMachine;
 import tech.pegasys.pantheon.consensus.ibft.blockcreation.IbftBlockCreatorFactory;
 import tech.pegasys.pantheon.consensus.ibft.blockcreation.IbftMiningCoordinator;
+import tech.pegasys.pantheon.consensus.ibft.jsonrpc.IbftJsonRpcMethodsFactory;
 import tech.pegasys.pantheon.consensus.ibft.network.IbftNetworkPeers;
 import tech.pegasys.pantheon.consensus.ibft.protocol.IbftProtocolManager;
 import tech.pegasys.pantheon.consensus.ibft.protocol.IbftSubProtocol;
@@ -54,6 +55,8 @@ import tech.pegasys.pantheon.ethereum.eth.sync.SyncMode;
 import tech.pegasys.pantheon.ethereum.eth.sync.SynchronizerConfiguration;
 import tech.pegasys.pantheon.ethereum.eth.sync.state.SyncState;
 import tech.pegasys.pantheon.ethereum.eth.transactions.TransactionPoolFactory;
+import tech.pegasys.pantheon.ethereum.jsonrpc.RpcApi;
+import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.JsonRpcMethod;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.api.ProtocolManager;
 import tech.pegasys.pantheon.ethereum.p2p.config.SubProtocolConfiguration;
@@ -62,6 +65,8 @@ import tech.pegasys.pantheon.ethereum.storage.StorageProvider;
 import tech.pegasys.pantheon.ethereum.worldstate.WorldStateStorage;
 
 import java.io.IOException;
+import java.util.Collection;
+import java.util.Map;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
@@ -267,6 +272,12 @@ public class IbftPantheonController implements PantheonController<IbftContext> {
     return null;
   }
 
+  @Override
+  public Map<String, JsonRpcMethod> getAdditionalJsonRpcMethods(
+      final Collection<RpcApi> enabledRpcApis) {
+    return new IbftJsonRpcMethodsFactory().methods(context, enabledRpcApis);
+  }
+
   @Override
   public void close() {
     closer.run();

pantheon/src/main/java/tech/pegasys/pantheon/controller/PantheonController.java

@@ -12,6 +12,8 @@
  */
 package tech.pegasys.pantheon.controller;
 
+import static java.util.Collections.emptyMap;
+
 import tech.pegasys.pantheon.config.GenesisConfigFile;
 import tech.pegasys.pantheon.config.GenesisConfigOptions;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
@@ -21,12 +23,16 @@ import tech.pegasys.pantheon.ethereum.core.MiningParameters;
 import tech.pegasys.pantheon.ethereum.core.Synchronizer;
 import tech.pegasys.pantheon.ethereum.core.TransactionPool;
 import tech.pegasys.pantheon.ethereum.eth.sync.SynchronizerConfiguration;
+import tech.pegasys.pantheon.ethereum.jsonrpc.RpcApi;
+import tech.pegasys.pantheon.ethereum.jsonrpc.internal.methods.JsonRpcMethod;
 import tech.pegasys.pantheon.ethereum.mainnet.MainnetProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.mainnet.ProtocolSchedule;
 import tech.pegasys.pantheon.ethereum.p2p.config.SubProtocolConfiguration;
 import tech.pegasys.pantheon.ethereum.storage.StorageProvider;
 
 import java.io.Closeable;
+import java.util.Collection;
+import java.util.Map;
 
 public interface PantheonController<C> extends Closeable {
 
@@ -81,4 +87,9 @@ public interface PantheonController<C> extends Closeable {
   TransactionPool getTransactionPool();
 
   MiningCoordinator getMiningCoordinator();
+
+  default Map<String, JsonRpcMethod> getAdditionalJsonRpcMethods(
+      final Collection<RpcApi> enabledRpcApis) {
+    return emptyMap();
+  }
 }