Extract SignalJsonRpcDispatcherHandler

diff --git a/src/main/java/org/asamk/signal/commands/JsonRpcDispatcherCommand.java b/src/main/java/org/asamk/signal/commands/JsonRpcDispatcherCommand.java
index 6e0c3173d802813466d4fa491ecfe7aa03e61245..b61916a1950df78136ced5fe12be0db9c926b1be 100644 (file)
--- a/src/main/java/org/asamk/signal/commands/JsonRpcDispatcherCommand.java
+++ b/src/main/java/org/asamk/signal/commands/JsonRpcDispatcherCommand.java
@@ -1,30 +1,15 @@
 package org.asamk.signal.commands;
 
-import com.fasterxml.jackson.core.TreeNode;
-import com.fasterxml.jackson.databind.JsonMappingException;
-import com.fasterxml.jackson.databind.JsonNode;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.node.ContainerNode;
-
 import net.sourceforge.argparse4j.impl.Arguments;
 import net.sourceforge.argparse4j.inf.Namespace;
 import net.sourceforge.argparse4j.inf.Subparser;
 
-import org.asamk.signal.JsonReceiveMessageHandler;
 import org.asamk.signal.JsonWriter;
 import org.asamk.signal.OutputType;
 import org.asamk.signal.OutputWriter;
 import org.asamk.signal.commands.exceptions.CommandException;
-import org.asamk.signal.commands.exceptions.IOErrorException;
-import org.asamk.signal.commands.exceptions.UntrustedKeyErrorException;
-import org.asamk.signal.commands.exceptions.UserErrorException;
-import org.asamk.signal.jsonrpc.JsonRpcException;
-import org.asamk.signal.jsonrpc.JsonRpcReader;
-import org.asamk.signal.jsonrpc.JsonRpcRequest;
-import org.asamk.signal.jsonrpc.JsonRpcResponse;
-import org.asamk.signal.jsonrpc.JsonRpcSender;
+import org.asamk.signal.jsonrpc.SignalJsonRpcDispatcherHandler;
 import org.asamk.signal.manager.Manager;
-import org.asamk.signal.util.Util;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -32,16 +17,12 @@ import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.util.List;
-import java.util.Map;
+import java.util.function.Supplier;
 
 public class JsonRpcDispatcherCommand implements LocalCommand {
 
     private final static Logger logger = LoggerFactory.getLogger(JsonRpcDispatcherCommand.class);
 
-    private static final int USER_ERROR = -1;
-    private static final int IO_ERROR = -3;
-    private static final int UNTRUSTED_KEY_ERROR = -4;
-
     @Override
     public String getName() {
         return "jsonRpc";
@@ -67,100 +48,17 @@ public class JsonRpcDispatcherCommand implements LocalCommand {
         final boolean ignoreAttachments = Boolean.TRUE.equals(ns.getBoolean("ignore-attachments"));
         m.setIgnoreAttachments(ignoreAttachments);
 
-        final var objectMapper = Util.createJsonObjectMapper();
-        final var jsonRpcSender = new JsonRpcSender((JsonWriter) outputWriter);
-
-        final var receiveMessageHandler = new JsonReceiveMessageHandler(m,
-                s -> jsonRpcSender.sendRequest(JsonRpcRequest.forNotification("receive",
-                        objectMapper.valueToTree(s),
-                        null)));
-        m.addReceiveHandler(receiveMessageHandler);
-
-        // Maybe this should be handled inside the Manager
-        while (!m.hasCaughtUpWithOldMessages()) {
-            try {
-                synchronized (m) {
-                    m.wait();
-                }
-            } catch (InterruptedException ignored) {
-            }
-        }
-
-        final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
-
-        final var jsonRpcReader = new JsonRpcReader(jsonRpcSender, () -> {
+        final var jsonOutputWriter = (JsonWriter) outputWriter;
+        final var reader = new BufferedReader(new InputStreamReader(System.in));
+        final Supplier<String> lineSupplier = () -> {
             try {
                 return reader.readLine();
             } catch (IOException e) {
                 throw new AssertionError(e);
             }
-        });
-        jsonRpcReader.readRequests((method, params) -> handleRequest(m, objectMapper, method, params),
-                response -> logger.debug("Received unexpected response for id {}", response.getId()));
-
-        m.removeReceiveHandler(receiveMessageHandler);
-    }
-
-    private JsonNode handleRequest(
-            final Manager m, final ObjectMapper objectMapper, final String method, ContainerNode<?> params
-    ) throws JsonRpcException {
-        final Object[] result = {null};
-        final JsonWriter commandOutputWriter = s -> {
-            if (result[0] != null) {
-                throw new AssertionError("Command may only write one json result");
-            }
-
-            result[0] = s;
         };
 
-        var command = Commands.getCommand(method);
-        if (!(command instanceof JsonRpcCommand)) {
-            throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.METHOD_NOT_FOUND,
-                    "Method not implemented",
-                    null));
-        }
-
-        try {
-            parseParamsAndRunCommand(m, objectMapper, params, commandOutputWriter, (JsonRpcCommand<?>) command);
-        } catch (JsonMappingException e) {
-            throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.INVALID_REQUEST,
-                    e.getMessage(),
-                    null));
-        } catch (UserErrorException e) {
-            throw new JsonRpcException(new JsonRpcResponse.Error(USER_ERROR, e.getMessage(), null));
-        } catch (IOErrorException e) {
-            throw new JsonRpcException(new JsonRpcResponse.Error(IO_ERROR, e.getMessage(), null));
-        } catch (UntrustedKeyErrorException e) {
-            throw new JsonRpcException(new JsonRpcResponse.Error(UNTRUSTED_KEY_ERROR, e.getMessage(), null));
-        } catch (Throwable e) {
-            logger.error("Command execution failed", e);
-            throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.INTERNAL_ERROR,
-                    e.getMessage(),
-                    null));
-        }
-
-        Object output = result[0] == null ? Map.of() : result[0];
-        return objectMapper.valueToTree(output);
-    }
-
-    private <T> void parseParamsAndRunCommand(
-            final Manager m,
-            final ObjectMapper objectMapper,
-            final TreeNode params,
-            final OutputWriter outputWriter,
-            final JsonRpcCommand<T> command
-    ) throws CommandException, JsonMappingException {
-        T requestParams = null;
-        final var requestType = command.getRequestType();
-        if (params != null && requestType != null) {
-            try {
-                requestParams = objectMapper.readValue(objectMapper.treeAsTokens(params), requestType);
-            } catch (JsonMappingException e) {
-                throw e;
-            } catch (IOException e) {
-                throw new AssertionError(e);
-            }
-        }
-        command.handleCommand(requestParams, m, outputWriter);
+        final var handler = new SignalJsonRpcDispatcherHandler(m, jsonOutputWriter, lineSupplier);
+        handler.handleConnection();
     }
 }

diff --git a/src/main/java/org/asamk/signal/jsonrpc/SignalJsonRpcDispatcherHandler.java b/src/main/java/org/asamk/signal/jsonrpc/SignalJsonRpcDispatcherHandler.java
new file mode 100644 (file)
index 0000000..9085609
--- /dev/null
+++ b/src/main/java/org/asamk/signal/jsonrpc/SignalJsonRpcDispatcherHandler.java
@@ -0,0 +1,138 @@
+package org.asamk.signal.jsonrpc;
+
+import com.fasterxml.jackson.core.TreeNode;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ContainerNode;
+
+import org.asamk.signal.JsonReceiveMessageHandler;
+import org.asamk.signal.JsonWriter;
+import org.asamk.signal.OutputWriter;
+import org.asamk.signal.commands.Commands;
+import org.asamk.signal.commands.JsonRpcCommand;
+import org.asamk.signal.commands.exceptions.CommandException;
+import org.asamk.signal.commands.exceptions.IOErrorException;
+import org.asamk.signal.commands.exceptions.UntrustedKeyErrorException;
+import org.asamk.signal.commands.exceptions.UserErrorException;
+import org.asamk.signal.manager.Manager;
+import org.asamk.signal.util.Util;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.function.Supplier;
+
+public class SignalJsonRpcDispatcherHandler {
+
+    private final static Logger logger = LoggerFactory.getLogger(SignalJsonRpcDispatcherHandler.class);
+
+    private static final int USER_ERROR = -1;
+    private static final int IO_ERROR = -3;
+    private static final int UNTRUSTED_KEY_ERROR = -4;
+
+    private final Manager m;
+    private final JsonWriter outputWriter;
+    private final Supplier<String> lineSupplier;
+
+    public SignalJsonRpcDispatcherHandler(
+            final Manager m, final JsonWriter outputWriter, final Supplier<String> lineSupplier
+    ) {
+        this.m = m;
+        this.outputWriter = outputWriter;
+        this.lineSupplier = lineSupplier;
+    }
+
+    public void handleConnection() {
+        final var objectMapper = Util.createJsonObjectMapper();
+        final var jsonRpcSender = new JsonRpcSender(outputWriter);
+
+        final var receiveMessageHandler = new JsonReceiveMessageHandler(m,
+                s -> jsonRpcSender.sendRequest(JsonRpcRequest.forNotification("receive",
+                        objectMapper.valueToTree(s),
+                        null)));
+        try {
+            m.addReceiveHandler(receiveMessageHandler);
+
+            // Maybe this should be handled inside the Manager
+            while (!m.hasCaughtUpWithOldMessages()) {
+                try {
+                    synchronized (m) {
+                        m.wait();
+                    }
+                } catch (InterruptedException ignored) {
+                }
+            }
+
+            final var jsonRpcReader = new JsonRpcReader(jsonRpcSender, lineSupplier);
+            jsonRpcReader.readRequests((method, params) -> handleRequest(m, objectMapper, method, params),
+                    response -> logger.debug("Received unexpected response for id {}", response.getId()));
+        } finally {
+            m.removeReceiveHandler(receiveMessageHandler);
+        }
+    }
+
+    private JsonNode handleRequest(
+            final Manager m, final ObjectMapper objectMapper, final String method, ContainerNode<?> params
+    ) throws JsonRpcException {
+        final Object[] result = {null};
+        final JsonWriter commandOutputWriter = s -> {
+            if (result[0] != null) {
+                throw new AssertionError("Command may only write one json result");
+            }
+
+            result[0] = s;
+        };
+
+        var command = Commands.getCommand(method);
+        if (!(command instanceof JsonRpcCommand)) {
+            throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.METHOD_NOT_FOUND,
+                    "Method not implemented",
+                    null));
+        }
+
+        try {
+            parseParamsAndRunCommand(m, objectMapper, params, commandOutputWriter, (JsonRpcCommand<?>) command);
+        } catch (JsonMappingException e) {
+            throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.INVALID_REQUEST,
+                    e.getMessage(),
+                    null));
+        } catch (UserErrorException e) {
+            throw new JsonRpcException(new JsonRpcResponse.Error(USER_ERROR, e.getMessage(), null));
+        } catch (IOErrorException e) {
+            throw new JsonRpcException(new JsonRpcResponse.Error(IO_ERROR, e.getMessage(), null));
+        } catch (UntrustedKeyErrorException e) {
+            throw new JsonRpcException(new JsonRpcResponse.Error(UNTRUSTED_KEY_ERROR, e.getMessage(), null));
+        } catch (Throwable e) {
+            logger.error("Command execution failed", e);
+            throw new JsonRpcException(new JsonRpcResponse.Error(JsonRpcResponse.Error.INTERNAL_ERROR,
+                    e.getMessage(),
+                    null));
+        }
+
+        Object output = result[0] == null ? Map.of() : result[0];
+        return objectMapper.valueToTree(output);
+    }
+
+    private <T> void parseParamsAndRunCommand(
+            final Manager m,
+            final ObjectMapper objectMapper,
+            final TreeNode params,
+            final OutputWriter outputWriter,
+            final JsonRpcCommand<T> command
+    ) throws CommandException, JsonMappingException {
+        T requestParams = null;
+        final var requestType = command.getRequestType();
+        if (params != null && requestType != null) {
+            try {
+                requestParams = objectMapper.readValue(objectMapper.treeAsTokens(params), requestType);
+            } catch (JsonMappingException e) {
+                throw e;
+            } catch (IOException e) {
+                throw new AssertionError(e);
+            }
+        }
+        command.handleCommand(requestParams, m, outputWriter);
+    }
+}