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Refactor internals of batch lazy loading and query fetches
This commit is contained in:
Rob Bygrave
@@ -1,80 +0,0 @@
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package com.avaje.ebeaninternal.server.loadcontext;
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import java.util.List;
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import org.junit.Assert;
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import org.junit.Test;
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import com.avaje.ebean.BaseTestCase;
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public class TestDLoadWeakList extends BaseTestCase {
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@Test
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public void test() {
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String s0 = new String("zero");
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String s1 = new String("one");
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String s2 = new String("two");
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String s3 = new String("three");
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String s4 = new String("four");
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String s5 = new String("five");
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String s6 = new String("six");
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String s7 = new String("seven");
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String s8 = new String("eight");
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String s9 = new String("nine");
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String s10 = new String("ten");
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DLoadWeakList<Object> list = new DLoadWeakList<Object>();
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list.add(s0);
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list.add(s1);
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list.add(s2);
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list.add(s3);
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list.add(s4);
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list.add(s5);
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list.add(s6);
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list.add(s7);
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list.add(s8);
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list.add(s9);
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list.add(s10);
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Assert.assertEquals(11, list.list.size());
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System.gc();
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try {
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Thread.sleep(300);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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// this is really only a HINT, so no guarantee
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// .. but the SUN JVM does do the business
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System.gc();
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Assert.assertEquals(11, list.list.size());
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List<Object> b0 = list.getLoadBatch(0, 2);
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Assert.assertEquals(2, b0.size());
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Assert.assertEquals("zero", b0.get(0));
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Assert.assertEquals("one", b0.get(1));
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try {
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b0 = list.getLoadBatch(0, 2);
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Assert.assertTrue(false);
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} catch (IllegalStateException e) {
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Assert.assertTrue(true);
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}
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b0 = list.getNextBatch(2);
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Assert.assertEquals(2, b0.size());
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Assert.assertEquals("two", b0.get(0));
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Assert.assertEquals("three", b0.get(1));
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list.removeEntry(1);
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b0 = list.getLoadBatch(7, 2);
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Assert.assertEquals(2, b0.size());
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Assert.assertEquals("seven", b0.get(0));
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Assert.assertEquals("eight", b0.get(1));
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}
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}
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-108
@@ -1,108 +0,0 @@
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package com.avaje.ebeaninternal.server.loadcontext;
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import java.lang.ref.WeakReference;
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import java.util.List;
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import org.junit.Assert;
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import org.junit.Test;
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import com.avaje.ebean.BaseTestCase;
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public class TestDLoadWeakListWithGC extends BaseTestCase {
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private void doStuffInMethodScope(DLoadWeakList<Object> list) {
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String s5 = new String("five");
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String s6 = new String("six");
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String s7 = new String("seven");
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String s8 = new String("eight");
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String s9 = new String("nine");
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String s10 = new String("ten");
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list.add(s5);
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list.add(s6);
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list.add(s7);
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list.add(s8);
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list.add(s9);
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list.add(s10);
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}
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@Test
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public void test() {
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String s0 = new String("zero");
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String s1 = new String("one");
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String s2 = new String("two");
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String s3 = new String("three");
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String s4 = new String("four");
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DLoadWeakList<Object> list = new DLoadWeakList<Object>();
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list.add(s0);
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list.add(s1);
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list.add(s2);
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list.add(s3);
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list.add(s4);
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int initialSize = list.list.size();
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doStuffInMethodScope(list);
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Assert.assertEquals(11, list.list.size());
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System.gc();
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try {
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Thread.sleep(300);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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// this is really only a HINT, so no guarantee
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// .. but the SUN JVM does do the business
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System.gc();
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Assert.assertEquals(11, list.list.size());
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// these weak refs are still good as we still
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// have a hard reference to the objects in scope
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for (int i = 0; i < initialSize; i++) {
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WeakReference<Object> weakReference = list.list.get(i);
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Assert.assertNotNull(weakReference);
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Assert.assertNotNull(weakReference.get());
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}
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// these weak refs are all null as we don't have
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// hard refs to the objects in scope ... and it just
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// so happens the System.gc() in sun jvm is aggressive here.
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for (int i = initialSize; i < list.list.size(); i++) {
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WeakReference<Object> weakReference = list.list.get(i);
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Assert.assertNotNull(weakReference);
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Assert.assertNull(weakReference.get());
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}
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List<Object> b0 = list.getLoadBatch(0, 2);
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Assert.assertEquals(2, b0.size());
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Assert.assertEquals("zero", b0.get(0));
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Assert.assertEquals("one", b0.get(1));
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try {
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b0 = list.getLoadBatch(0, 2);
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Assert.assertTrue(false);
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} catch (IllegalStateException e) {
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Assert.assertTrue(true);
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}
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b0 = list.getNextBatch(2);
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Assert.assertEquals(2, b0.size());
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Assert.assertEquals("two", b0.get(0));
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Assert.assertEquals("three", b0.get(1));
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list.removeEntry(1);
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try {
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// past the gc blown area
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b0 = list.getLoadBatch(7, 2);
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Assert.assertTrue(false);
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} catch (IllegalStateException e) {
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Assert.assertTrue(true);
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}
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}
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}
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