--- /dev/null
+/*
+ * Sone - PluginConnector.java - Copyright © 2010 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.wotns.freenet.plugin;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import net.pterodactylus.util.collection.Pair;
+import freenet.pluginmanager.FredPluginTalker;
+import freenet.pluginmanager.PluginNotFoundException;
+import freenet.pluginmanager.PluginRespirator;
+import freenet.pluginmanager.PluginTalker;
+import freenet.support.SimpleFieldSet;
+import freenet.support.api.Bucket;
+
+/**
+ * Interface for talking to other plugins. Other plugins are identified by their
+ * name and a unique connection identifier.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class PluginConnector implements FredPluginTalker {
+
+ /** The plugin respirator. */
+ private final PluginRespirator pluginRespirator;
+
+ /** Connector listener managers for all plugin connections. */
+ private final Map<Pair<String, String>, ConnectorListenerManager> connectorListenerManagers = Collections.synchronizedMap(new HashMap<Pair<String, String>, ConnectorListenerManager>());
+
+ /**
+ * Creates a new plugin connector.
+ *
+ * @param pluginRespirator
+ * The plugin respirator
+ */
+ public PluginConnector(PluginRespirator pluginRespirator) {
+ this.pluginRespirator = pluginRespirator;
+ }
+
+ //
+ // LISTENER MANAGEMENT
+ //
+
+ /**
+ * Adds a connection listener for the given plugin connection.
+ *
+ * @param pluginName
+ * The name of the plugin
+ * @param identifier
+ * The identifier of the connection
+ * @param connectorListener
+ * The listener to add
+ */
+ public void addConnectorListener(String pluginName, String identifier, ConnectorListener connectorListener) {
+ getConnectorListenerManager(pluginName, identifier).addListener(connectorListener);
+ }
+
+ /**
+ * Removes a connection listener for the given plugin connection.
+ *
+ * @param pluginName
+ * The name of the plugin
+ * @param identifier
+ * The identifier of the connection
+ * @param connectorListener
+ * The listener to remove
+ */
+ public void removeConnectorListener(String pluginName, String identifier, ConnectorListener connectorListener) {
+ getConnectorListenerManager(pluginName, identifier).removeListener(connectorListener);
+ }
+
+ //
+ // ACTIONS
+ //
+
+ /**
+ * Sends a request to the given plugin.
+ *
+ * @param pluginName
+ * The name of the plugin
+ * @param identifier
+ * The identifier of the connection
+ * @param fields
+ * The fields of the message
+ * @throws PluginException
+ * if the plugin can not be found
+ */
+ public void sendRequest(String pluginName, String identifier, SimpleFieldSet fields) throws PluginException {
+ sendRequest(pluginName, identifier, fields, null);
+ }
+
+ /**
+ * Sends a request to the given plugin.
+ *
+ * @param pluginName
+ * The name of the plugin
+ * @param identifier
+ * The identifier of the connection
+ * @param fields
+ * The fields of the message
+ * @param data
+ * The payload of the message (may be null)
+ * @throws PluginException
+ * if the plugin can not be found
+ */
+ public void sendRequest(String pluginName, String identifier, SimpleFieldSet fields, Bucket data) throws PluginException {
+ getPluginTalker(pluginName, identifier).send(fields, data);
+ }
+
+ //
+ // PRIVATE METHODS
+ //
+
+ /**
+ * Returns the connection listener manager for the given plugin connection,
+ * creating a new one if none does exist yet.
+ *
+ * @param pluginName
+ * The name of the plugin
+ * @param identifier
+ * The identifier of the connection
+ * @return The connection listener manager
+ */
+ private ConnectorListenerManager getConnectorListenerManager(String pluginName, String identifier) {
+ return getConnectorListenerManager(pluginName, identifier, true);
+ }
+
+ /**
+ * Returns the connection listener manager for the given plugin connection,
+ * optionally creating a new one if none does exist yet.
+ *
+ * @param pluginName
+ * The name of the plugin
+ * @param identifier
+ * The identifier of the connection
+ * @param create
+ * {@code true} to create a new manager if there is none,
+ * {@code false} to return {@code null} in that case
+ * @return The connection listener manager, or {@code null} if none existed
+ * and {@code create} is {@code false}
+ */
+ private ConnectorListenerManager getConnectorListenerManager(String pluginName, String identifier, boolean create) {
+ ConnectorListenerManager connectorListenerManager = connectorListenerManagers.get(new Pair<String, String>(pluginName, identifier));
+ if (create && (connectorListenerManager == null)) {
+ connectorListenerManager = new ConnectorListenerManager(this);
+ connectorListenerManagers.put(new Pair<String, String>(pluginName, identifier), connectorListenerManager);
+ }
+ return connectorListenerManager;
+ }
+
+ /**
+ * Returns the plugin talker for the given plugin connection.
+ *
+ * @param pluginName
+ * The name of the plugin
+ * @param identifier
+ * The identifier of the connection
+ * @return The plugin talker
+ * @throws PluginException
+ * if the plugin can not be found
+ */
+ private PluginTalker getPluginTalker(String pluginName, String identifier) throws PluginException {
+ try {
+ return pluginRespirator.getPluginTalker(this, pluginName, identifier);
+ } catch (PluginNotFoundException pnfe1) {
+ throw new PluginException(pnfe1);
+ }
+ }
+
+ //
+ // INTERFACE FredPluginTalker
+ //
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public void onReply(String pluginName, String identifier, SimpleFieldSet params, Bucket data) {
+ ConnectorListenerManager connectorListenerManager = getConnectorListenerManager(pluginName, identifier, false);
+ if (connectorListenerManager == null) {
+ /* we don’t care about events for this plugin. */
+ return;
+ }
+ connectorListenerManager.fireReceivedReply(params, data);
+ }
+
+}
projects / WoTNS.git / blobdiff