public void runWriter() throws Exception {
new File(FILE_NAME).delete();
System.out.println("Waiting 3s, now start the reader");
Thread.sleep(3000);
MemoryMappedFile mem = new MemoryMappedFile(FILE_NAME, FILE_SIZE);
mem.putLong(NON_VOLATILE_FIELD, 1);
mem.putLongVolatile(VOLATILE_FIELD, 2);
mem.unmap();
}
public void runReader() throws Exception {
MemoryMappedFile mem = new MemoryMappedFile(FILE_NAME, FILE_SIZE);
long nonVolatileField = mem.getLong(NON_VOLATILE_FIELD);
assertEquals(0, nonVolatileField, "Non Volatile Field");
long volatileField = mem.getLongVolatile(VOLATILE_FIELD);
assertEquals(0, volatileField, "Volatile Field");
long start = System.currentTimeMillis();
while (true) {
volatileField = mem.getLongVolatile(VOLATILE_FIELD);
if (volatileField != 0) {
break;
}
if (System.currentTimeMillis() - start > 3000) {
System.out.println("TEST FAILED: timeout waiting for the volatile field to change");
return;
}
}
nonVolatileField = mem.getLong(NON_VOLATILE_FIELD);
assertEquals(1, nonVolatileField, "Non Volatile Field");
assertEquals(2, volatileField, "Volatile Field");
mem.unmap();
}
