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GEODE-10093 - Fixed attr issue in Delta Session (apache#7405)
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* GEODE-10093 - Fixed attr issue in Delta Session

(cherry picked from commit e040759)
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@BenjaminPerryRoss
BenjaminPerryRoss committed Mar 1, 2022
1 parent 0c14807 commit d987ab7
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Showing 2 changed files with 110 additions and 3 deletions.
98 changes: 98 additions & 0 deletions ...n/java/org/apache/geode/modules/session/catalina/AbstractDeltaSessionIntegrationTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -17,8 +17,12 @@

import static org.apache.geode.cache.RegionShortcut.PARTITION;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;
Expand All @@ -35,11 +39,15 @@
import org.junit.Rule;
import org.junit.Test;
import org.mockito.ArgumentCaptor;
import org.mockito.InOrder;
import org.mockito.Mockito;

import org.apache.geode.cache.Region;
import org.apache.geode.internal.util.BlobHelper;
import org.apache.geode.modules.session.catalina.callback.SessionExpirationCacheListener;
import org.apache.geode.modules.session.catalina.internal.DeltaSessionDestroyAttributeEvent;
import org.apache.geode.modules.session.catalina.internal.DeltaSessionStatistics;
import org.apache.geode.modules.session.catalina.internal.DeltaSessionUpdateAttributeEvent;
import org.apache.geode.test.junit.rules.ServerStarterRule;

public abstract class AbstractDeltaSessionIntegrationTest<DeltaSessionManagerT extends DeltaSessionManager<?>, DeltaSessionT extends DeltaSession> {
Expand Down Expand Up @@ -107,4 +115,94 @@ public void serializedAttributesNotLeakedWhenSessionInvalidated() throws IOExcep
verifyNoMoreInteractions(listener);
assertThat(event.getValue().getValue()).isEqualTo(value1);
}

@Test
public void setNewAttributeWithNullValueInvokesRemove() {
final HttpSessionAttributeListener listener = mock(HttpSessionAttributeListener.class);
when(context.getApplicationEventListeners()).thenReturn(new Object[] {listener});
when(manager.isBackingCacheAvailable()).thenReturn(true);

final DeltaSessionT session = spy(newSession(manager));
session.setId(KEY, false);
session.setValid(true);
session.setOwner(manager);

final String name = "attribute";
final Object nullValue = null;

session.setAttribute(name, nullValue);
assertThat(session.getAttributes().size()).isEqualTo(0);

verify(session).queueAttributeEvent(any(DeltaSessionDestroyAttributeEvent.class), anyBoolean());
verify(session, times(0)).queueAttributeEvent(any(DeltaSessionUpdateAttributeEvent.class),
anyBoolean());
verify(session).removeAttribute(eq(name));
}

@Test
public void setExistingAttributeWithNullValueInvokesRemove() {
final HttpSessionAttributeListener listener = mock(HttpSessionAttributeListener.class);
when(context.getApplicationEventListeners()).thenReturn(new Object[] {listener});
when(manager.isBackingCacheAvailable()).thenReturn(true);

final DeltaSessionT session = spy(newSession(manager));
session.setId(KEY, false);
session.setValid(true);
session.setOwner(manager);

final String name = "attribute";
final Object value = "value";
final Object nullValue = null;

session.setAttribute(name, value);
assertThat(session.getAttributes().size()).isEqualTo(1);

session.setAttribute(name, nullValue);
assertThat(session.getAttributes().size()).isEqualTo(0);


InOrder inOrder = Mockito.inOrder(session);
inOrder.verify(session).queueAttributeEvent(any(DeltaSessionUpdateAttributeEvent.class),
anyBoolean());
inOrder.verify(session).removeAttribute(eq(name));
inOrder.verify(session).queueAttributeEvent(any(DeltaSessionDestroyAttributeEvent.class),
anyBoolean());
}

@Test
public void getAttributeWithNullValueReturnsNull() throws IOException, ClassNotFoundException {
final HttpSessionAttributeListener listener = mock(HttpSessionAttributeListener.class);
when(context.getApplicationEventListeners()).thenReturn(new Object[] {listener});
when(manager.isBackingCacheAvailable()).thenReturn(true);

final DeltaSessionT session = spy(newSession(manager));
session.setId(KEY, false);
session.setValid(true);
session.setOwner(manager);

final String name = "attribute";
final Object value = null;

final byte[] serializedValue1 = BlobHelper.serializeToBlob(value);
// simulates initial deserialized state with serialized attribute values.
session.getAttributes().put(name, serializedValue1);

assertThat(session.getAttribute(name)).isNull();
}

@Test
public void getAttributeWithNullNameReturnsNull() throws IOException, ClassNotFoundException {
final HttpSessionAttributeListener listener = mock(HttpSessionAttributeListener.class);
when(context.getApplicationEventListeners()).thenReturn(new Object[] {listener});
when(manager.isBackingCacheAvailable()).thenReturn(true);

final DeltaSessionT session = spy(newSession(manager));
session.setId(KEY, false);
session.setValid(true);
session.setOwner(manager);

final String name = null;

assertThat(session.getAttribute(name)).isNull();
}
}
15 changes: 12 additions & 3 deletions ...s/geode-modules/src/main/java/org/apache/geode/modules/session/catalina/DeltaSession.java
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Original file line number Diff line number Diff line change
Expand Up @@ -254,7 +254,7 @@ public void setAttribute(String name, Object value, boolean notify) {

synchronized (changeLock) {
// Serialize the value
byte[] serializedValue = serialize(value);
final byte[] serializedValue = value == null ? null : serialize(value);

// Store the attribute locally
if (preferDeserializedForm) {
Expand All @@ -266,7 +266,9 @@ public void setAttribute(String name, Object value, boolean notify) {
super.setAttribute(name, serializedValue, true);
}

if (serializedValue == null) {
// super.setAttribute above performed a removeAttribute for a value which was null once
// deserialized.
if (value == null) {
return;
}

Expand Down Expand Up @@ -332,6 +334,9 @@ protected void setAttributeInternal(String name, Object value) {

@Override
public Object getAttribute(String name) {
if (name == null) {
return null;
}
checkBackingCacheAvailable();
Object value = deserializeAttribute(name, super.getAttribute(name), preferDeserializedForm);

Expand All @@ -353,6 +358,10 @@ private Object deserializeAttribute(final String name, final Object value, final
if (value instanceof byte[]) {
try {
final Object deserialized = BlobHelper.deserializeBlob((byte[]) value);
if (deserialized == null) {
removeAttributeInternal(name, false);
return null;
}
if (store) {
setAttributeInternal(name, deserialized);
}
Expand Down Expand Up @@ -478,7 +487,7 @@ private void initializeRegion(DeltaSessionManager<?> sessionManager) {
}
}

private void queueAttributeEvent(DeltaSessionAttributeEvent event,
void queueAttributeEvent(DeltaSessionAttributeEvent event,
boolean checkAddToCurrentGatewayDelta) {
// Add to current gateway delta if necessary
if (checkAddToCurrentGatewayDelta) {
Expand Down

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