ringles commented on a change in pull request #7403:
URL: https://github.com/apache/geode/pull/7403#discussion_r832340615
##########
File path:
geode-for-redis/src/main/java/org/apache/geode/redis/internal/data/RedisList.java
##########
@@ -127,50 +127,139 @@ private int getArrayIndex(int listIndex) {
}
/**
- * @param elementsToAdd elements to add to this set; NOTE this list may by
modified by this call
- * @param region the region this instance is stored in
- * @param key the name of the set to add to
- * @param onlyIfExists if true then the elements should only be added if the
key already exists
- * and holds a list, otherwise no operation is performed.
- * @return the length of the list after the operation
- */
- public long lpush(List<byte[]> elementsToAdd, Region<RedisKey, RedisData>
region, RedisKey key,
- final boolean onlyIfExists) {
- elementsPush(elementsToAdd);
- storeChanges(region, key, new AddByteArrays(elementsToAdd));
+ * @return the number of elements in the list
+ **/
+ public int llen() {
return elementList.size();
}
/**
* @param region the region this instance is stored in
- * @param key the name of the set to add to
+ * @param key the name of the list to add to
* @return the element actually popped
*/
public byte[] lpop(Region<RedisKey, RedisData> region, RedisKey key) {
- byte[] popped = elementRemove(0);
- RemoveElementsByIndex removed = new RemoveElementsByIndex();
- removed.add(0);
+ byte newVersion;
+ byte[] popped;
+ RemoveElementsByIndex removed;
+ synchronized (this) {
+ newVersion = incrementAndGetVersion();
+ popped = removeFirstElement();
+ removed = new RemoveElementsByIndex(newVersion);
+ removed.add(0);
+ }
storeChanges(region, key, removed);
return popped;
}
+ public synchronized byte[] removeFirstElement() {
+ return elementList.removeFirst();
+ }
+
+ public synchronized byte[] removeLastElement() {
+ return elementList.removeLast();
+ }
+
/**
- * @return the number of elements in the list
+ * @param elementsToAdd elements to add to this list; NOTE this list may be
modified by this call
+ * @param region the region this instance is stored in
+ * @param key the name of the list to add to
+ * @param onlyIfExists if true then the elements should only be added if the
key already exists
+ * and holds a list, otherwise no operation is performed.
+ * @return the length of the list after the operation
*/
- public int llen() {
+ public long lpush(List<byte[]> elementsToAdd, Region<RedisKey, RedisData>
region, RedisKey key,
+ final boolean onlyIfExists) {
+ byte newVersion;
+ AddByteArrays addByteArrays;
+ synchronized (this) {
+ newVersion = incrementAndGetVersion();
+ elementsPush(elementsToAdd);
+ addByteArrays = new AddByteArrays(newVersion, elementsToAdd);
+ }
+ storeChanges(region, key, addByteArrays);
return elementList.size();
}
+ /**
+ * @param elementsToAdd elements to add to this list; NOTE this list may be
modified by this call
+ * @param region the region this instance is stored in
+ * @param key the name of the list to add to
+ * @return the number of elements actually added
+ */
+ public long lpush(List<byte[]> elementsToAdd, Region<RedisKey, RedisData>
region, RedisKey key) {
+ byte newVersion;
+ AddByteArrays addByteArrays;
+ synchronized (this) {
+ newVersion = incrementAndGetVersion();
+ elementsPush(elementsToAdd);
+ addByteArrays = new AddByteArrays(newVersion, elementsToAdd);
+ }
+ storeChanges(region, key, addByteArrays);
+ return elementList.size();
+ }
+
+ public byte[] ltrim(long start, long end, Region<RedisKey, RedisData> region,
+ RedisKey key) {
+ byte newVersion;
+ int length = elementList.size();
+ int boundedStart = getBoundedStartIndex(start, length);
+ int boundedEnd = getBoundedEndIndex(end, length);
+ List<Integer> removed = new ArrayList<>();
+ RemoveElementsByIndex removeElementsByIndex;
+
+ synchronized (this) {
+ if (boundedStart > boundedEnd || boundedStart == length) {
+ // Remove everything
+ for (int i = length - 1; i >= 0; i--) {
+ removed.add(i);
+ }
+ } else {
+ // Remove any elements after boundedEnd
+ for (int i = length - 1; i > boundedEnd; i--) {
+ removed.add(i);
+ }
+
+ // Remove any elements before boundedStart
+ for (int i = boundedStart - 1; i >= 0; i--) {
+ removed.add(i);
+ }
+ }
+
+ if (removed.size() > 0) {
Review comment:
Mooted by redesign.
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