#2447: Add API for fluent server connect requests

API allows for more control over callback to see why the callback was performed whilst maintaining backwards compatibility

api/src/main/java/net/md_5/bungee/api/ServerConnectRequest.java

@@ -0,0 +1,101 @@
+package net.md_5.bungee.api;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NonNull;
+import net.md_5.bungee.api.config.ServerInfo;
+import net.md_5.bungee.api.event.ServerConnectEvent;
+
+/**
+ * A request to connect a server.
+ */
+@Getter
+@Builder
+public class ServerConnectRequest
+{
+
+    /**
+     * The result from this callback after request has been executed by proxy.
+     */
+    public enum Result
+    {
+
+        /**
+         * ServerConnectEvent to the new server was canceled.
+         */
+        EVENT_CANCEL,
+        /**
+         * Already connected to target server.
+         */
+        ALREADY_CONNECTED,
+        /**
+         * Already connecting to target server.
+         */
+        ALREADY_CONNECTING,
+        /**
+         * Successfully connected to server.
+         */
+        SUCCESS,
+        /**
+         * Connection failed, error can be accessed from callback method handle.
+         */
+        FAIL
+    }
+
+    /**
+     * Target server to connect to.
+     */
+    @NonNull
+    private final ServerInfo target;
+    /**
+     * Reason for connecting to server.
+     */
+    @NonNull
+    private final ServerConnectEvent.Reason reason;
+    /**
+     * Callback to execute post request.
+     */
+    private final Callback<Result> result;
+    /**
+     * Timeout in milliseconds for request.
+     */
+    private final int connectTimeout;
+    /**
+     * Should the player be attempted to connect to the next server in their
+     * queue if the initial request fails.
+     */
+    private final boolean retry;
+
+    /**
+     * Class that sets default properties/adds methods to the lombok builder
+     * generated class.
+     */
+    public static class ServerConnectRequestBuilder
+    {
+
+        private Callback<Result> result;
+        private int connectTimeout = 5000; // TODO: Configurable
+
+        /**
+         * Sets the callback to execute on explicit succession of the request.
+         *
+         * @param callback the callback to execute
+         * @return this builder for chaining
+         * @deprecated recommended to use callback providing generic type of
+         * {@link Result}
+         */
+        @Deprecated
+        public ServerConnectRequestBuilder callback(final Callback<Boolean> callback)
+        {
+            this.result = new Callback<Result>()
+            {
+                @Override
+                public void done(final Result result, final Throwable error)
+                {
+                    callback.done( ( result == Result.SUCCESS ) ? Boolean.TRUE : Boolean.FALSE, error );
+                }
+            };
+            return this;
+        }
+    }
+}

api/src/main/java/net/md_5/bungee/api/connection/ProxiedPlayer.java

@@ -6,6 +6,7 @@ import java.util.UUID;
 import net.md_5.bungee.api.Callback;
 import net.md_5.bungee.api.ChatMessageType;
 import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.ServerConnectRequest;
 import net.md_5.bungee.api.SkinConfiguration;
 import net.md_5.bungee.api.Title;
 import net.md_5.bungee.api.chat.BaseComponent;
@@ -123,6 +124,15 @@ public interface ProxiedPlayer extends Connection, CommandSender
      */
     void connect(ServerInfo target, Callback<Boolean> callback, ServerConnectEvent.Reason reason);
 
+    /**
+     * Connects / transfers this user to the specified connection, gracefully
+     * closing the current one. Depending on the implementation, this method
+     * might return before the user has been connected.
+     *
+     * @param request request to connect with
+     */
+    void connect(ServerConnectRequest request);
+
     /**
      * Gets the server this player is connected to.
      *