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package whitebox.stax_api.client;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import java.io.*;
import junit.framework.TestCase;
/**
* @author Jitendra Kotamraju
*/
public class ConcurrencyTest extends TestCase {
private static final XMLOutputFactory xof =
XMLOutputFactory.newInstance();
private static final XMLInputFactory xif =
XMLInputFactory.newInstance();
// Keep this until sjsxp in JDK disables instance reuse
static {
try {
xif.setProperty("reuse-instance", false);
} catch (IllegalArgumentException e) {
// ignore
}
}
private static final int NO_THREADS = 10;
private static final int PER_THREAD = 5000;
public void test() throws Exception {
Thread[] threads = new Thread[NO_THREADS];
MyRunnable[] run = new MyRunnable[NO_THREADS];
for (int i = 0; i < NO_THREADS; i++) {
run[i] = new MyRunnable(i);
threads[i] = new Thread(run[i]);
}
for (int i = 0; i < NO_THREADS; i++) {
threads[i].start();
}
for (int i = 0; i < NO_THREADS; i++) {
threads[i].join();
}
for (int i = 0; i < NO_THREADS; i++) {
Exception e = run[i].getException();
if (e != null) {
e.printStackTrace();
fail("Failed with exception." + e);
}
}
}
private static class MyRunnable implements Runnable {
final int no;
volatile Exception e;
MyRunnable(int no) {
this.no = no;
}
public void run() {
for (int req = 0; req < PER_THREAD && e == null; req++) {
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
XMLStreamWriter w = getWriter(bos);
//System.out.println("Writer="+w+" Thread="+Thread.currentThread());
w.writeStartDocument();
w.writeStartElement("hello");
for (int j = 0; j < 50; j++) {
w.writeStartElement("a" + j);
w.writeEndElement();
}
w.writeEndElement();
w.writeEndDocument();
w.close();
bos.close();
ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
XMLStreamReader r = getReader(bis);
while (r.hasNext()) {
r.next();
}
r.close();
bis.close();
} catch (Exception e) {
this.e = e;
}
}
}
public Exception getException() {
return e;
}
}
// Should use synchronized as per API. But without it,
// it should work with woodstox, sjsxp
private static XMLStreamReader getReader(InputStream is)
throws Exception {
return xif.createXMLStreamReader(is);
}
// Should use synchronized as per API. But without it,
// it should work with woodstox, sjsxp
private static XMLStreamWriter getWriter(OutputStream os)
throws Exception {
return xof.createXMLStreamWriter(os);
}
}