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package org.glassfish.jersey.tests.memleaks.testleak;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.inject.Singleton;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
/**
* Resource that causes {@link OutOfMemoryError} exception upon repetitive call of {@link #invoke(int)} of an application that is
* being redeployed.
* <p/>
* The purpose of this resource (and the app) is to test whether the memory leaking infrastructure for redeployment scenarios
* works.
*
* @author Stepan Vavra (stepan.vavra at oracle.com)
*/
@Path("/")
@Singleton
public class DaemonThreadMemoryLeakingResource {
@POST
@Path("invoke")
public String invoke(@DefaultValue("1048576") @QueryParam("size") final int size) {
final Future<?> future = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setDaemon(true).build())
.submit(new Runnable() {
@Override
public void run() {
try {
System.out.println("Running a Thread!");
final int mbytes = size / (1024 * 1024);
final byte[][] bytes = new byte[mbytes][];
for (int i = 1; i <= mbytes; ++i) {
bytes[i - 1] = new byte[1024 * 1024];
System.out.println("Allocated: " + i + "MB!");
}
System.out.println("Memory allocated! Total: " + mbytes + "MB! Sleeping...");
for (int i = 0; i < 1000000; ++i) {
System.out.println("Thread " + Thread.currentThread() + " sleeping!");
Thread.sleep(10000);
}
System.out.println("Freeing: " + size + " of bytes. " + bytes);
} catch (InterruptedException e) {
throw new IllegalStateException("Thread Interrupted!", e);
} catch (Throwable e) {
e.printStackTrace();
throw e;
}
}
});
System.out.println("Trying to allocate bytes from the thread itself.");
final byte[] bytes = new byte[size];
return "Future submitted: " + future + " bytes allocated: " + bytes;
}
@GET
@Path("hello")
@Produces("text/plain")
public String helloWorld() {
System.out.println("HELLO WORLD!");
return "HELLO WORLD!";
}
}