Add an AliasLoader and associated plumbing.

Introduce a global lifecycle component interface which provides a
way to start/stop components, and will help with The Quitting Problem™
when we get around to it.

Change-Id: I6d43f354e90e8206bea3f61a74d09728c9cac5aa
Reviewed-on: http://gerrit.dmdirc.com/3520
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

src/com/dmdirc/commandparser/aliases/AliasLifecycleManager.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2006-2014 DMDirc Developers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc.commandparser.aliases;
+
+import com.dmdirc.interfaces.SystemLifecycleComponent;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+
+/**
+ * Manages the lifecycle of the alias system, loading at startup and saving at shutdown.
+ */
+@Singleton
+public class AliasLifecycleManager implements SystemLifecycleComponent {
+
+    /** The loader to use to load/save aliases. */
+    private final AliasLoader loader;
+
+    @Inject
+    public AliasLifecycleManager(final AliasLoader loader) {
+        this.loader = loader;
+    }
+
+    @Override
+    public void startUp() {
+        loader.load();
+    }
+
+    @Override
+    public void shutDown() {
+        loader.save();
+    }
+
+}

src/com/dmdirc/commandparser/aliases/AliasLoader.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2006-2014 DMDirc Developers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc.commandparser.aliases;
+
+import javax.inject.Inject;
+
+/**
+ * Loads aliases from a store into a manager.
+ */
+public class AliasLoader {
+
+    private final AliasManager manager;
+    private final AliasStore store;
+
+    @Inject
+    public AliasLoader(final AliasManager manager, final AliasStore store) {
+        this.manager = manager;
+        this.store = store;
+    }
+
+    /**
+     * Loads aliases from the store into the manager.
+     */
+    public void load() {
+        for (Alias alias : store.readAliases()) {
+            manager.addAlias(alias);
+        }
+    }
+
+    /**
+     * Saves aliases from the manager to the store.
+     */
+    public void save() {
+        store.writeAliases(manager.getAliases());
+    }
+
+}

src/com/dmdirc/interfaces/SystemLifecycleComponent.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2006-2014 DMDirc Developers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc.interfaces;
+
+/**
+ * A component that participates in or needs to know about the system lifecycle.
+ */
+public interface SystemLifecycleComponent {
+
+    /**
+     * Called when the system or component is starting up.
+     */
+    void startUp();
+
+    /**
+     * Called when the system or component is shutting down.
+     * <p>
+     * Any resources or threads used by the implementing class must be released before returning
+     * from this method.
+     */
+    void shutDown();
+
+}