From 01f83faa26c78aa8aaff1200cabcb746628a2bdd Mon Sep 17 00:00:00 2001
From: brido4125 <hcs4125@gmail.com>
Date: Wed, 28 Jun 2023 12:54:06 +0900
Subject: [PATCH] FIX: Element sequence when using asyncLopInsert api.

---
 .../collection/CollectionPipedInsert.java     |  6 ++-
 .../bulkoperation/PipeInsertTest.java         | 51 +++++++++++++++++++
 .../PipedBulkInsertListWithAttrTest.java      |  6 +--
 3 files changed, 59 insertions(+), 4 deletions(-)

diff --git a/src/main/java/net/spy/memcached/collection/CollectionPipedInsert.java b/src/main/java/net/spy/memcached/collection/CollectionPipedInsert.java
index d83590240..91db6ddcf 100644
--- a/src/main/java/net/spy/memcached/collection/CollectionPipedInsert.java
+++ b/src/main/java/net/spy/memcached/collection/CollectionPipedInsert.java
@@ -90,7 +90,11 @@ public ByteBuffer getAsciiCommand() {
           CollectionCreate.makeCreateClause(attribute, cd.getFlags()) : "";
       for (int i = this.nextOpIndex; i < eSize; i++) {
         byte[] each = encodedList.get(i);
-        setArguments(bb, COMMAND, key, index, each.length,
+        int offset = i;
+        if (index < 0) {
+          offset = 0;
+        }
+        setArguments(bb, COMMAND, key, index + offset, each.length,
                      createOption, (i < eSize - 1) ? PIPE : "");
         bb.put(each);
         bb.put(CRLF);
diff --git a/src/test/manual/net/spy/memcached/bulkoperation/PipeInsertTest.java b/src/test/manual/net/spy/memcached/bulkoperation/PipeInsertTest.java
index cb7a345ec..445c6a9c8 100644
--- a/src/test/manual/net/spy/memcached/bulkoperation/PipeInsertTest.java
+++ b/src/test/manual/net/spy/memcached/bulkoperation/PipeInsertTest.java
@@ -147,6 +147,57 @@ public void testLopPipeInsert() {
     }
   }
 
+  public void testLopPipeInsertIndex() {
+    int elementCount = 3;
+    List<Object> middleElements = new ArrayList<Object>(elementCount);
+    List<Object> headerElements = new ArrayList<Object>(elementCount);
+    List<Object> footerElements = new ArrayList<Object>(elementCount);
+
+    for (int i = 0; i < elementCount; i++) {
+      middleElements.add("middleValue" + i);
+      headerElements.add("headerValue" + i);
+      footerElements.add("footerValue" + i);
+    }
+
+    try {
+      CollectionAttributes attr = new CollectionAttributes();
+
+      mc.asyncLopInsert(KEY, 0, "FirstValue", attr).get(5000L, TimeUnit.MILLISECONDS);
+      mc.asyncLopInsert(KEY, -1, "LastValue", attr).get(5000L, TimeUnit.MILLISECONDS);
+
+      CollectionFuture<Map<Integer, CollectionOperationStatus>> future1 =
+              mc.asyncLopPipedInsertBulk(KEY, 1, middleElements, attr);
+      CollectionFuture<Map<Integer, CollectionOperationStatus>> future2 =
+              mc.asyncLopPipedInsertBulk(KEY, 0, headerElements, attr);
+      CollectionFuture<Map<Integer, CollectionOperationStatus>> future3 =
+              mc.asyncLopPipedInsertBulk(KEY, -1, footerElements, attr);
+
+
+      Map<Integer, CollectionOperationStatus> map1
+              = future1.get(5000L, TimeUnit.MILLISECONDS);
+      Map<Integer, CollectionOperationStatus> map2
+              = future2.get(5000L, TimeUnit.MILLISECONDS);
+      Map<Integer, CollectionOperationStatus> map3
+              = future3.get(5000L, TimeUnit.MILLISECONDS);
+
+
+      Assert.assertEquals(map1.size() + map2.size() + map3.size(), 0);
+
+      List<Object> list = mc.asyncLopGet(KEY, 0, 9999, false, false).get();
+
+      System.out.println("list = " + list);
+
+      Assert.assertEquals((elementCount * 3) + 2, list.size());
+
+      Assert.assertEquals(headerElements, list.subList(0, elementCount));
+      Assert.assertEquals(middleElements, list.subList(elementCount + 1, elementCount  * 2 + 1));
+      Assert.assertEquals(footerElements, list.subList(elementCount * 3 - 1, elementCount * 3 + 2));
+    } catch (Exception e) {
+      e.printStackTrace();
+      Assert.fail(e.getMessage());
+    }
+  }
+
   public void testMopPipeInsert() {
     int elementCount = 5000;
 
diff --git a/src/test/manual/net/spy/memcached/emptycollection/PipedBulkInsertListWithAttrTest.java b/src/test/manual/net/spy/memcached/emptycollection/PipedBulkInsertListWithAttrTest.java
index 9313fe4c4..469e1a9d5 100644
--- a/src/test/manual/net/spy/memcached/emptycollection/PipedBulkInsertListWithAttrTest.java
+++ b/src/test/manual/net/spy/memcached/emptycollection/PipedBulkInsertListWithAttrTest.java
@@ -74,7 +74,7 @@ public void testInsertWithAttribute() {
       // check values
       List<Object> list2 = mc.asyncLopGet(KEY, 0, 10, false, false).get();
       for (int i = 0; i < list2.size(); i++) {
-        Assert.assertEquals(10 - i, list2.get(i));
+        Assert.assertEquals(i + 1, list2.get(i));
       }
 
       // check expire time
@@ -114,7 +114,7 @@ public void testInsertWithDefaultAttribute() {
       // check values
       List<Object> list2 = mc.asyncLopGet(KEY, 0, 10, false, false).get();
       for (int i = 0; i < list2.size(); i++) {
-        Assert.assertEquals(10 - i, list2.get(i));
+        Assert.assertEquals(i + 1, list2.get(i));
       }
     } catch (Exception e) {
       e.printStackTrace();
@@ -147,7 +147,7 @@ public void testInsertWithoutAttributeCreate() {
       // check values
       List<Object> list2 = mc.asyncLopGet(KEY, 0, 10, false, false).get();
       for (int i = 0; i < list2.size(); i++) {
-        Assert.assertEquals(10 - i, list2.get(i));
+        Assert.assertEquals(i + 1, list2.get(i));
       }
     } catch (Exception e) {
       e.printStackTrace();