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added host semaphores 

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150847 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
cmarschner 2002-10-22 15:22:59 +00:00
parent 2d3e3954ac
commit 922db8cfe6
1 changed files with 58 additions and 1 deletions
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59
sandbox/contributions/webcrawler-LARM/src/de/lanlab/larm/net/HostInfo.java
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@ -79,7 +79,62 @@ public class HostInfo
private int id;
private int healthyCount = 5;
int healthyCount = 8;
int locks = 2; // max. concurrent requests
int lockObtained = 0; // for debugging
Object lockMonitor = new Object();
public Object getLockMonitor()
{
return lockMonitor;
}
public void releaseLock()
{
synchronized(lockMonitor)
{
if(lockObtained>=0)
{
locks++;
lockObtained--;
// try
// {
// throw new Exception();
//
// }
// catch(Exception e)
// {
// System.out.println("HostInfo: release called at: " + e.getStackTrace()[1]);
// }
// System.out.println("HostInfo " + hostName + ": releaseing Lock. now " + lockObtained + " locks obtained, " + locks + " available");
}
// else
// {
// System.out.println("HostInfo: lock released although no lock acquired!?");
// }
}
}
// must be synchronized
public void obtainLock()
{
locks--;
lockObtained++;
// try
// {
// throw new Exception();
//
// }
// catch(Exception e)
// {
// System.out.println("obtain called at: " + e.getStackTrace()[1]);
// }
// System.out.println("HostInfo " + hostName + ": obtaining Lock. now " + lockObtained + " locks obtained, " + locks + " available");
}
// must be synchronized
public boolean isBusy()
{
return locks<=0;
}
// five strikes, and you're out
private boolean isReachable = true;
@ -194,6 +249,7 @@ public class HostInfo
public void badRequest()
{
healthyCount--;
System.out.println("HostInfo: " + this.hostName + ": badRequest. " + healthyCount + " left");
}
@ -205,6 +261,7 @@ public class HostInfo
public void setReachable(boolean reachable)
{
isReachable = reachable;
System.out.println("HostInfo: " + this.hostName + ": setting to " + (reachable ? "reachable" : "unreachable"));
}