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137 lines (114 loc) · 3.94 KB
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package org.mapdb;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import java.util.Queue;
import java.util.concurrent.BlockingQueue;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.*;
@SuppressWarnings({"rawtypes","unchecked"})
public class QueuesTest {
@Test public void stack_persisted(){
File f = UtilsTest.tempDbFile();
DB db = DBMaker.newFileDB(f).transactionDisable().cacheDisable().make();
Queue<Object> stack = db.getStack("test");
stack.add("1");
stack.add("2");
stack.add("3");
stack.add("4");
db.close();
db = DBMaker.newFileDB(f).transactionDisable().cacheDisable().deleteFilesAfterClose().make();
stack = db.getStack("test");
assertEquals("4",stack.poll());
assertEquals("3",stack.poll());
assertEquals("2",stack.poll());
assertEquals("1",stack.poll());
assertNull(stack.poll());
db.close();
}
@Test public void queue_persisted(){
File f = UtilsTest.tempDbFile();
DB db = DBMaker.newFileDB(f).transactionDisable().cacheDisable().make();
Queue<Object> queue = db.getQueue("test");
queue.add("1");
queue.add("2");
queue.add("3");
queue.add("4");
db.close();
db = DBMaker.newFileDB(f).transactionDisable().cacheDisable().deleteFilesAfterClose().make();
queue = db.getQueue("test");
assertEquals("1", queue.poll());
assertEquals("2", queue.poll());
assertEquals("3", queue.poll());
assertEquals("4", queue.poll());
assertNull(queue.poll());
db.close();
}
@Test public void circular_queue_persisted(){
//i put disk limit 4 objects ,
File f = UtilsTest.tempDbFile();
DB db = DBMaker.newFileDB(f).transactionDisable().cacheDisable().make();
Queue queue = db.createCircularQueue("test",null, 4);
//when i put 6 objects to queue
queue.add(0);
queue.add(1);
queue.add(2);
queue.add(3);
//now deletes 0 on first
queue.add(4);
//now deletes 1
queue.add(5);
db.close();
db = DBMaker.newFileDB(f).transactionDisable().cacheDisable().deleteFilesAfterClose().make();
queue = db.getCircularQueue("test");
assertEquals(2, queue.poll());
assertEquals(3, queue.poll());
assertEquals(4, queue.poll());
assertEquals(5, queue.poll());
assertNull(queue.poll());
db.close();
}
@Test
public void testMapDb() throws InterruptedException {
DB database = DBMaker.newMemoryDB().make();
BlockingQueue<String> queue = database.getQueue( "test-queue" );
queue.put( "test-value" );
database.commit();
assertThat( queue.take(), is( "test-value" ) );
database.commit();
database.close();
}
@Test(timeout=10000)
public void queueTakeRollback() throws IOException, InterruptedException {
File f = File.createTempFile("mapdb","aa");
{
DB db = DBMaker.newFileDB(f).make();
boolean newQueue = !db.exists("test");
BlockingQueue queue = db.getQueue("test");
if (newQueue) {
queue.add("abc");
db.commit();
}
Object x = queue.take();
db.rollback();
x = queue.take();
System.out.println("got it");
db.close();
}
{
DB db = DBMaker.newFileDB(f).make();
boolean newQueue = !db.exists("test");
BlockingQueue queue = db.getQueue("test");
if (newQueue) {
queue.add("abc");
db.commit();
}
Object x = queue.take();
db.rollback();
x = queue.take();
System.out.println("got it");
db.commit();
db.close();
}
}
}