X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fnet%2Fpterodactylus%2Fsonitus%2Fdata%2Ffilter%2FRateLimitingFilter.java;h=d513df6b1bad78241414a074bd2a69713b78de48;hb=7188da95cfb6dc2bf140eb8ac7e4dc99a0761a97;hp=7ee4116a3ae2563e5bf98341dc2a57a6402e3a20;hpb=3d073631242b121378ff9c60104170d13cab52d7;p=sonitus.git

diff --git a/src/main/java/net/pterodactylus/sonitus/data/filter/RateLimitingFilter.java b/src/main/java/net/pterodactylus/sonitus/data/filter/RateLimitingFilter.java
index 7ee4116..d513df6 100644
--- a/src/main/java/net/pterodactylus/sonitus/data/filter/RateLimitingFilter.java
+++ b/src/main/java/net/pterodactylus/sonitus/data/filter/RateLimitingFilter.java
@@ -17,24 +17,19 @@
 
 package net.pterodactylus.sonitus.data.filter;
 
-import java.io.EOFException;
 import java.io.IOException;
 import java.util.logging.Logger;
 
-import net.pterodactylus.sonitus.data.ConnectException;
-import net.pterodactylus.sonitus.data.Filter;
 import net.pterodactylus.sonitus.data.Metadata;
-import net.pterodactylus.sonitus.data.Source;
-
-import com.google.common.base.Preconditions;
 
 /**
  * Rate limiting filter that only passes a specified amount of data per second
- * from its {@link Source} to its {@link net.pterodactylus.sonitus.data.Sink}.
+ * from its {@link net.pterodactylus.sonitus.data.Source} to its {@link
+ * net.pterodactylus.sonitus.data.Sink}.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
-public class RateLimitingFilter implements Filter {
+public class RateLimitingFilter extends DummyFilter {
 
 	/** The logger. */
 	private static final Logger logger = Logger.getLogger(RateLimitingFilter.class.getName());
@@ -42,14 +37,11 @@ public class RateLimitingFilter implements Filter {
 	/** The limiting rate in bytes/second. */
 	private final int rate;
 
-	/** The fast start time. */
-	private final long fastStartTime;
-
-	/** The source. */
-	private Source source;
+	/** The start time. */
+	private long startTime;
 
-	/** The remaining fast start time. */
-	private long remainingFastStartTime;
+	/** The number of bytes. */
+	private long counter;
 
 	/**
 	 * Creates a new rate limiting filter.
@@ -72,8 +64,7 @@ public class RateLimitingFilter implements Filter {
 	 */
 	public RateLimitingFilter(int rate, long fastStartTime) {
 		this.rate = rate;
-		this.fastStartTime = fastStartTime;
-		remainingFastStartTime = fastStartTime;
+		this.counter = (long) (-rate * (fastStartTime / 1000.0));
 	}
 
 	//
@@ -81,39 +72,27 @@ public class RateLimitingFilter implements Filter {
 	//
 
 	@Override
-	public Metadata metadata() {
-		return source.metadata();
+	public void open(Metadata metadata) throws IOException {
+		super.open(metadata);
+		startTime = System.currentTimeMillis();
 	}
 
 	@Override
-	public byte[] get(int bufferSize) throws EOFException, IOException {
-		long now = System.currentTimeMillis();
-		byte[] buffer = source.get(bufferSize);
+	public void process(byte[] buffer) throws IOException {
+		super.process(buffer);
 		/* delay. */
-		long waitTime = 1000 * buffer.length / rate;
-		remainingFastStartTime = Math.max(remainingFastStartTime - waitTime, 0);
-		while ((remainingFastStartTime == 0) && (System.currentTimeMillis() - now) < waitTime) {
+		counter += buffer.length;
+		long waitTime = (long) (counter / (rate / 1000.0));
+		while ((System.currentTimeMillis() - startTime) < waitTime) {
 			try {
-				long limitDelay = waitTime - (System.currentTimeMillis() - now);
+				long limitDelay = waitTime - (System.currentTimeMillis() - startTime);
 				logger.finest(String.format("Waiting %d ms...", limitDelay));
 				Thread.sleep(limitDelay);
 			} catch (InterruptedException ie1) {
 				/* ignore, keep looping. */
 			}
 		}
-		return buffer;
-	}
-
-	@Override
-	public void connect(Source source) throws ConnectException {
-		Preconditions.checkNotNull(source, "source must not be null");
-
-		this.source = source;
-	}
-
-	@Override
-	public void metadataUpdated() {
-		/* ignore. */
+		logger.finest(String.format("Processed %d Bytes during %d ms, that’s %.1f bytes/s.", counter, System.currentTimeMillis() - startTime, counter / ((System.currentTimeMillis() - startTime) / 1000.0)));
 	}
 
 }