Added ListenerBoundEvent and ListenerCloseEvent. (#454)

api/src/main/java/com/velocitypowered/api/event/proxy/ListenerBoundEvent.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2018 Velocity Contributors
+ *
+ * The Velocity API is licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in the api top-level directory.
+ */
+
+package com.velocitypowered.api.event.proxy;
+
+import com.google.common.base.Preconditions;
+import com.velocitypowered.api.network.ListenerType;
+import java.net.InetSocketAddress;
+
+/**
+ * This event is fired by the proxy after a listener starts accepting connections.
+ */
+public final class ListenerBoundEvent {
+
+  private final InetSocketAddress address;
+  private final ListenerType listenerType;
+
+  public ListenerBoundEvent(InetSocketAddress address, ListenerType listenerType) {
+    this.address = Preconditions.checkNotNull(address, "address");
+    this.listenerType = Preconditions.checkNotNull(listenerType, "listenerType");
+  }
+
+  public InetSocketAddress getAddress() {
+    return address;
+  }
+
+  public ListenerType getListenerType() {
+    return listenerType;
+  }
+
+  @Override
+  public String toString() {
+    return "ListenerBoundEvent{"
+        + "address=" + address
+        + ", listenerType=" + listenerType
+        + '}';
+  }
+}

api/src/main/java/com/velocitypowered/api/event/proxy/ListenerCloseEvent.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2018 Velocity Contributors
+ *
+ * The Velocity API is licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in the api top-level directory.
+ */
+
+package com.velocitypowered.api.event.proxy;
+
+import com.google.common.base.Preconditions;
+import com.velocitypowered.api.network.ListenerType;
+import java.net.InetSocketAddress;
+
+/**
+ * This event is fired by the proxy before the proxy stops accepting connections.
+ */
+public final class ListenerCloseEvent {
+
+  private final InetSocketAddress address;
+  private final ListenerType listenerType;
+
+  public ListenerCloseEvent(InetSocketAddress address, ListenerType listenerType) {
+    this.address = Preconditions.checkNotNull(address, "address");
+    this.listenerType = Preconditions.checkNotNull(listenerType, "listenerType");
+  }
+
+  public InetSocketAddress getAddress() {
+    return address;
+  }
+
+  public ListenerType getListenerType() {
+    return listenerType;
+  }
+
+  @Override
+  public String toString() {
+    return "ListenerCloseEvent{"
+        + "address=" + address
+        + ", listenerType=" + listenerType
+        + '}';
+  }
+}

api/src/main/java/com/velocitypowered/api/network/ListenerType.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2018 Velocity Contributors
+ *
+ * The Velocity API is licensed under the terms of the MIT License. For more details,
+ * reference the LICENSE file in the api top-level directory.
+ */
+
+package com.velocitypowered.api.network;
+
+/**
+ * Represents each listener type.
+ */
+public enum ListenerType {
+  MINECRAFT("Minecraft"),
+  QUERY("Query");
+
+  final String name;
+
+  ListenerType(final String name) {
+    this.name = name;
+  }
+
+  @Override
+  public String toString() {
+    return this.name;
+  }
+}