Return null old value when expired on putX (fixes #26)

Author: ben-manes

caffeine/src/main/java/com/github/benmanes/caffeine/cache/BoundedLocalCache.java

@@ -1005,7 +1005,7 @@ V put(K key, V value, boolean notifyWriter, boolean onlyIfAbsent) {
         afterRead(prior, now, false);
       }
 
-      return oldValue;
+      return expired ? null : oldValue;
     }
   }
 

caffeine/src/test/java/com/github/benmanes/caffeine/cache/ExpirationTest.java

@@ -601,7 +601,7 @@ public void putIfAbsent_writerFails(Map<Integer, Integer> map, CacheContext cont
       expireAfterWrite = {Expire.DISABLED, Expire.ONE_MINUTE})
   public void put_insert(Map<Integer, Integer> map, CacheContext context) {
     context.ticker().advance(1, TimeUnit.MINUTES);
-    map.put(context.firstKey(), context.absentValue());
+    assertThat(map.put(context.firstKey(), context.absentValue()), is(nullValue()));
 
     long count = context.initialSize();
     assertThat(map.size(), is(1));
@@ -616,8 +616,8 @@ public void put_insert(Map<Integer, Integer> map, CacheContext context) {
   public void put_replace(Map<Integer, Integer> map, CacheContext context) {
     context.ticker().advance(30, TimeUnit.SECONDS);
 
-    map.put(context.firstKey(), context.absentValue());
-    map.put(context.absentKey(), context.absentValue());
+    assertThat(map.put(context.firstKey(), context.absentValue()), is(not(nullValue())));
+    assertThat(map.put(context.absentKey(), context.absentValue()), is(nullValue()));
     context.consumedNotifications().clear(); // Ignore replacement notification
 
     context.ticker().advance(45, TimeUnit.SECONDS);

caffeine/src/test/java/com/github/benmanes/caffeine/cache/ExpireAfterAccessTest.java

@@ -192,7 +192,7 @@ public void putIfAbsent(Map<Integer, Integer> map, CacheContext context) {
     assertThat(map.putIfAbsent(context.firstKey(), context.absentValue()), is(not(nullValue())));
 
     context.ticker().advance(30, TimeUnit.SECONDS);
-    map.putIfAbsent(context.lastKey(), context.absentValue());
+    assertThat(map.putIfAbsent(context.lastKey(), context.absentValue()), is(nullValue()));
 
     long count = context.initialSize() - 1;
     assertThat(map.size(), is(2));

caffeine/src/test/java/com/github/benmanes/caffeine/cache/ExpireAfterWriteTest.java

@@ -177,7 +177,7 @@ public void putIfAbsent(Map<Integer, Integer> map, CacheContext context) {
     assertThat(map.putIfAbsent(context.firstKey(), context.absentValue()), is(not(nullValue())));
 
     context.ticker().advance(30, TimeUnit.SECONDS);
-    map.putIfAbsent(context.lastKey(), context.absentValue());
+    assertThat(map.putIfAbsent(context.lastKey(), context.absentValue()), is(nullValue()));
 
     long count = context.initialSize();
     assertThat(map.size(), is(1));

gradle/dependencies.gradle

@@ -57,7 +57,7 @@ ext {
     ehcache2: '2.10.0-10',
     ehcache3: '3.0.0.m2',
     high_scale_lib: '1.0.6',
-    infinispan: '8.0.0.CR1',
+    infinispan: '8.0.0.Final',
     jackrabbit: '1.3.4',
     jamm: '0.3.1',
     java_object_layout: '0.3.2',