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add method to clear cache

This commit is contained in:
Doug MacEachern 2007-04-22 00:46:40 +00:00
parent 6002e9b892
commit 0d8c2d6014
1 changed files with 35 additions and 6 deletions
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41
bindings/java/src/org/hyperic/sigar/ptql/ProcessQueryFactory.java
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@ -18,17 +18,36 @@
package org.hyperic.sigar.ptql; package org.hyperic.sigar.ptql;
import java.util.Iterator;
import java.util.Map; import java.util.Map;
import org.hyperic.sigar.util.ReferenceMap; import java.util.HashMap;
public class ProcessQueryFactory { public class ProcessQueryFactory {
private static Map cache = private static ProcessQueryFactory instance = null;
ReferenceMap.synchronizedMap();
private Map cache = new HashMap();
public ProcessQueryFactory() {} public ProcessQueryFactory() {}
public static ProcessQuery getInstance(String query) public void clear() {
for (Iterator it=this.cache.values().iterator();
it.hasNext();)
{
SigarProcessQuery query = (SigarProcessQuery)it.next();
query.destroy();
}
this.cache.clear();
}
public static ProcessQueryFactory getInstance() {
if (instance == null) {
instance = new ProcessQueryFactory();
}
return instance;
}
public ProcessQuery getQuery(String query)
throws MalformedQueryException { throws MalformedQueryException {
if (query == null) { if (query == null) {
@ -39,7 +58,7 @@ public class ProcessQueryFactory {
throw new MalformedQueryException("empty query"); throw new MalformedQueryException("empty query");
} }
ProcessQuery pQuery = (ProcessQuery)cache.get(query); ProcessQuery pQuery = (ProcessQuery)this.cache.get(query);
if (pQuery != null) { if (pQuery != null) {
return pQuery; return pQuery;
@ -47,7 +66,17 @@ public class ProcessQueryFactory {
pQuery = new SigarProcessQuery(); pQuery = new SigarProcessQuery();
((SigarProcessQuery)pQuery).create(query); ((SigarProcessQuery)pQuery).create(query);
cache.put(query, pQuery); this.cache.put(query, pQuery);
return pQuery; return pQuery;
} }
/**
* @deprecated
* @see getQuery
*/
public static ProcessQuery getInstance(String query)
throws MalformedQueryException {
return getInstance().getQuery(query);
}
} }