From: David ‘Bombe’ Roden <bombe@pterodactylus.net>
Date: Fri, 15 Mar 2013 22:55:55 +0000 (+0100)
Subject: Add connection.
X-Git-Url: https://git.pterodactylus.net/?a=commitdiff_plain;h=3c80e17df7d3404a853c8782de55467be48d6ba1;p=sonitus.git

Add connection.
---

diff --git a/src/main/java/net/pterodactylus/sonitus/data/Connection.java b/src/main/java/net/pterodactylus/sonitus/data/Connection.java
new file mode 100644
index 0000000..b8bee32
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sonitus/data/Connection.java
@@ -0,0 +1,85 @@
+/*
+ * Sonitus - Connection.java - Copyright © 2013 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.sonitus.data;
+
+import java.io.IOException;
+
+/**
+ * A connection reads bytes from a {@link Source} and feeds it to a sink. This
+ * class is meant to be subclassed by each {@link Sink}, overriding the {@link
+ * #feed(byte[])} method to actually feed the data into the sink. The {@link
+ * #feed(byte[])} method is also responsible for blocking for an appropriate
+ * amount of time; this method determines how fast a {@link Source} is
+ * consumed.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public abstract class Connection implements Runnable {
+
+	/** The source to consume. */
+	private final Source source;
+
+	/**
+	 * Creates a new connection that will read from the given source.
+	 *
+	 * @param source
+	 * 		The source to read
+	 */
+	public Connection(Source source) {
+		this.source = source;
+	}
+
+	//
+	// RUNNABLE METHODS
+	//
+
+	@Override
+	public void run() {
+		while (true) {
+			try {
+				byte[] buffer = source.get(bufferSize());
+				feed(buffer);
+			} catch (IOException e) {
+				return;
+			}
+		}
+	}
+
+	//
+	// SUBCLASS METHODS
+	//
+
+	/**
+	 * Returns the number of bytes that will be requested from the source.
+	 *
+	 * @return The number of bytes that will be requested from the source
+	 */
+	protected abstract int bufferSize();
+
+	/**
+	 * Feeds the read data into the sink. The given buffer is always filled and
+	 * never contains excess elements.
+	 *
+	 * @param buffer
+	 * 		The data
+	 * @throws IOException
+	 * 		if an I/O error occurs
+	 */
+	protected abstract void feed(byte[] buffer) throws IOException;
+
+}