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/*
Derby - Class org.apache.derbyTesting.unitTests.services.T_CacheUser
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package org.apache.derbyTesting.unitTests.services;
import org.apache.derby.iapi.services.cache.*;
import org.apache.derbyTesting.unitTests.harness.T_Fail;
import org.apache.derby.iapi.services.stream.HeaderPrintWriter;
import org.apache.derby.iapi.error.StandardException;
import org.apache.derby.iapi.reference.SQLState;
public class T_CacheUser implements Runnable {
protected CacheManager cm;
protected int iterations;
protected HeaderPrintWriter out;
protected T_CacheService parent;
public T_CacheUser(CacheManager cm, int iterations, T_CacheService parent, HeaderPrintWriter out) {
this.cm = cm;
this.iterations = iterations;
this.parent = parent;
this.out = out;
}
public void run() {
try {
thrashCache();
} catch (T_Fail tf) {
parent.setChildException(tf);
} catch (StandardException se) {
parent.setChildException(T_Fail.exceptionFail(se));
}
}
/**
T_CachedInteger range - 0 - 100
pick a key randomly
48%/48%/4% chance of Int/String/invalid key
90%/5%/5% chance of can find / can't find / raise exception
50%/30%/20% find/findCached/create
@exception StandardException Standard Derby Error policy
@exception T_Fail Some error
*/
public void thrashCache() throws StandardException, T_Fail {
// stats
int f = 0, fs = 0, ff = 0, fe = 0;
int fc = 0, fcs = 0, fcf = 0;
int c = 0, cs = 0, cf = 0, ce = 0, cse = 0;
int cleanAll = 0, ageOut = 0;
int release = 0, remove = 0;
for (int i = 0; i < iterations; i++) {
if ((i % 100) == 0)
out.printlnWithHeader("iteration " + i);
T_Key tkey = T_Key.randomKey();
double rand = Math.random();
T_Cacheable e = null;
if (rand < 0.5) {
f++;
try {
e = (T_Cacheable) cm.find(tkey);
if (e == null) {
ff++;
continue;
}
fs++;
} catch (T_CacheException tc) {
if (tc.getType() == T_CacheException.ERROR)
throw tc;
// acceptable error
fe++;
continue;
}
} else if (rand < 0.8) {
fc++;
e = (T_Cacheable) cm.findCached(tkey);
if (e == null) {
fcf++;
continue;
}
fcs++;
} else {
c++;
try {
e = (T_Cacheable) cm.create(tkey, Thread.currentThread());
if (e == null) {
cf++;
continue;
}
cs++;
} catch (T_CacheException tc) {
if (tc.getType() == T_CacheException.ERROR)
throw tc;
// acceptable error
ce++;
continue;
} catch (StandardException se) {
if (se.getMessageId().equals(SQLState.OBJECT_EXISTS_IN_CACHE)) {
cse++;
continue;
}
throw se;
}
}
// ensure we can find it cached and that the key matches
cm.release(parent.t_findCachedSucceed(cm, tkey));
if (Math.random() < 0.25)
e.setDirty();
if (Math.random() < 0.75)
Thread.yield();
if ((Math.random() < 0.10) && (e.canRemove())) {
remove++;
cm.remove(e);
} else {
release++;
cm.release(e);
}
e = null;
double rand2 = Math.random();
if (rand2 < 0.02) {
cleanAll++;
cm.cleanAll();
}
else if (rand2 < 0.04) {
ageOut++;
cm.ageOut();
}
}
// ensure all our output in grouped.
synchronized (parent) {
out.printlnWithHeader("find() calls " + f + " : found/not found/exception : " + fs + "/" + ff + "/" + fe);
out.printlnWithHeader("findCached() calls " + fc + " : found/not found : " + fcs + "/" + fcf);
out.printlnWithHeader("create() calls " + c + " : found/not found/exception/standard exception : " + cs + "/" + cf + "/" + ce + "/" + cse);
out.printlnWithHeader("release() calls " + release);
out.printlnWithHeader("remove() calls " + remove);
out.printlnWithHeader("cleanAll() calls " + cleanAll);
out.printlnWithHeader("ageOut() calls " + ageOut);
}
}
}
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