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/**
* HttpConnectionInfo.java
* First published 07.04.2008 by Daniel Raap; danielr@users.berlios.de under the GPL
* Copyright 2010 by Michael Peter Christen for LGPL
* Dual-Licensing for LGPL granted by Daniel Raap 07.08.2010 by email
*
* $LastChangedDate$
* $LastChangedRevision$
* $LastChangedBy$
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program in the file lgpl21.txt
* If not, see <http://www.gnu.org/licenses/>.
*/
package net.yacy.cora.protocol;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
/**
* Information about a connection
*
* @author daniel
* @author sixcooler
*/
public class ConnectionInfo implements Comparable<ConnectionInfo> {
/**
* a list of all current connections to be shown in Connections_p
*/
private final static Set<ConnectionInfo> allConnections = Collections
.synchronizedSet(new HashSet<ConnectionInfo>());
private final static Set<ConnectionInfo> serverConnections = Collections
.synchronizedSet(new HashSet<ConnectionInfo>());
// this is only for statistics, so it can be bigger to see lost connectionInfos
private final static int staleAfterMillis = 30 * 60000; // 30 minutes
private static int maxcount = 20;
private static int serverMaxCount = 50;
private final String protocol;
private final String targetHost;
private final String command;
private final int id;
private final long initTime;
private final long upbytes;
/**
* constructor setting all data
*
* @param protocol
* @param targetHost
* @param command
* @param id
* @param initTime
*/
public ConnectionInfo(final String protocol, final String targetHost, final String command, final int id,
final long initTime, final long upbytes) {
this.protocol = protocol;
this.targetHost = targetHost;
this.command = command;
this.id = id;
this.initTime = initTime;
this.upbytes = upbytes;
}
/**
* @return
*/
public String getProtocol() {
return protocol;
}
/**
* @return
*/
public long getLifetime() {
return System.currentTimeMillis() - initTime;
}
/**
* @return
*/
public long getUpbytes() {
return upbytes;
}
/**
* @return
*/
public String getCommand() {
return command;
}
/**
* @return
*/
public String getTargetHost() {
return targetHost;
}
/**
* @return
*/
public int getID() {
return id;
}
/**
* gets a {@link Set} of all collected ConnectionInfos
*
* Important: iterations must be synchronized!
*
* @return the allConnections
*/
public static Set<ConnectionInfo> getAllConnections() {
return allConnections;
}
/**
* gets a {@link Set} of all collected server ConnectionInfos
*
* Important: iterations must be synchronized!
*
* @return the allConnections
*/
public static Set<ConnectionInfo> getServerConnections() {
return serverConnections;
}
/**
* gets the number of active client connections
*
* @return count of active connections
*/
public static int getCount() {
return getAllConnections().size();
}
/**
* gets the number of active server connections
*
* @return count of active connections
*/
public static int getServerCount() {
return getServerConnections().size();
}
/**
* gets the usage of the Client connection manager by active connections
*
* @return load in percent
*/
public static int getLoadPercent() {
return getCount() * 100 / getMaxcount();
}
/**
* @return wether the server max connection-count is reached
*/
public static boolean isServerCountReached() {
return getServerCount() >= getServerMaxcount();
}
/**
* @return how many bytes queued up
*/
public static long getActiveUpbytes() {
long up = 0L;
Iterator<ConnectionInfo> iter = getAllConnections().iterator();
synchronized (iter) {
while (iter.hasNext()) {
ConnectionInfo con = iter.next();
up += con.getUpbytes();
}
}
return up;
}
/**
* gets the max connection count of the Client connection manager
*
* @return max connections
*/
public static int getMaxcount() {
return maxcount;
}
/**
* gets the max connection count of the Client connection manager
* to be used in statistics
*
* @param max connections
* @TODO Is it correct to only set if max > 0? What if maxcount is > 0 and max = 0 ?
*/
public static void setMaxcount(final int max) {
if (max > 0) maxcount = max;
}
/**
* gets the max connection count of the Server connection manager
*
* @return max connections
*/
public static int getServerMaxcount() {
return serverMaxCount;
}
/**
* gets the max connection count of the Sever connection manager
* to be used in statistics
*
* @param max connections
* @TODO Is it correct to only set if max > 0? What if maxcount is > 0 and max = 0 ?
*/
public static void setServerMaxcount(final int max) {
if (max > 0) serverMaxCount = max;
}
/**
* add a connection to the list of all current connections
*
* @param conInfo
*/
public static void addConnection(final ConnectionInfo conInfo) {
getAllConnections().add(conInfo);
}
/**
* add a Server connection to the list of all current connections
*
* @param conInfo
*/
public static void addServerConnection(final ConnectionInfo conInfo) {
getServerConnections().add(conInfo);
}
/**
* remove a connection from the list of all current connections
*
* @param conInfo
*/
protected static void removeConnection(final ConnectionInfo conInfo) {
getAllConnections().remove(conInfo);
}
/**
* remove a Server connection from the list of all current connections
*
* @param conInfo
*/
public static void removeServerConnection(final ConnectionInfo conInfo) {
getServerConnections().remove(conInfo);
}
/**
* connections with same id {@link equals()} another
*
* @param id
*/
public static void removeConnection(final int id) {
removeConnection(new ConnectionInfo(null, null, null, id, 0, 0));
}
/**
* connections with same id {@link equals()} another
*
* @param id
*/
public static void removeServerConnection(final int id) {
removeServerConnection(new ConnectionInfo(null, null, null, id, 0, 0));
}
/**
* removes stale connections
*/
public static void cleanUp() {
cleanup(getAllConnections());
cleanup(getServerConnections());
}
private static void cleanup(final Set<ConnectionInfo> connectionSet) {
final Iterator<ConnectionInfo> iter = connectionSet.iterator();
synchronized (iter) {
while (iter.hasNext()) {
ConnectionInfo con = null;
try {
con = iter.next();
} catch (Throwable e) {break;} // this must break because otherwise there is danger that the loop does never terminates
try {
if (con.getLifetime() > staleAfterMillis) {
connectionSet.remove(con);
}
} catch (Throwable e) {continue;}
}
}
}
/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
final StringBuilder string = new StringBuilder(50);
string.append("ID ");
string.append(getID());
string.append(", ");
string.append(getProtocol());
string.append("://");
string.append(getTargetHost());
string.append(" ");
string.append(getCommand());
string.append(", since ");
string.append(getLifetime());
string.append(" ms");
return string.toString();
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + id;
return result;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(final Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
final ConnectionInfo other = (ConnectionInfo) obj;
return this.id == other.id;
}
@Override
public int compareTo(ConnectionInfo o) {
if(o==null) throw new NullPointerException("ConnectionInfo: compare() : passed argument is null \n");
if(this.initTime>o.initTime) return 1;
else if(this.initTime<o.initTime) return -1;
else return 0;
}
}
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