aloyszhang commented on code in PR #9894:
URL: https://github.com/apache/inlong/pull/9894#discussion_r1544004213
##########
inlong-common/src/main/java/org/apache/inlong/common/msg/InLongMsg.java:
##########
@@ -246,13 +246,12 @@ public boolean addMsg(String attr, ByteBuffer data) {
return false;
}
- DataBuffer outputBuffer = attr2MsgBuffer.get(attr);
- if (outputBuffer == null) {
- outputBuffer = new DataBuffer();
- attr2MsgBuffer.put(attr, outputBuffer);
+ DataBuffer outputBuffer = attr2MsgBuffer.computeIfAbsent(attr, key -> {
+ DataBuffer newBuffer = new DataBuffer();
// attrlen + utflen + meglen + compress
this.datalen += attr.length() + 2 + 4 + 1;
- }
+ return newBuffer;
+ });
Review Comment:
```java
DataBuffer outputBuffer = attr2MsgBuffer.computeIfAbsent(attr, key -> {
DataBuffer newBuffer = new DataBuffer();
// attrlen + utflen + meglen + compress
this.datalen += attr.length() + 2 + 4 + 1;
return newBuffer;
});
```
computeIfAbsent should create a new DataBuffer only if the mapping for attr
does not exist.
These two lines should move out of the mappingFunction.
```java
// attrlen + utflen + meglen + compress
this.datalen += attr.length() + 2 + 4 + 1;
```
Suggestion:
```java
attr2MsgBuffer.computeIfAbsent(attr, k-> new DataBuffer());
// attrlen + utflen + meglen + compress
this.datalen += attr.length() + 2 + 4 + 1;
```
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