ShadowySpirits commented on code in PR #5887:
URL: https://github.com/apache/rocketmq/pull/5887#discussion_r1104072908
##########
store/src/main/java/org/apache/rocketmq/store/DefaultMessageStore.java:
##########
@@ -2571,9 +2595,77 @@ public long getJoinTime() {
}
}
+ class BatchDispatchRequest {
+
+ private ByteBuffer byteBuffer;
+
+ private int position;
+
+ private int size;
+
+ private long id;
+
+ public BatchDispatchRequest(ByteBuffer byteBuffer, int position, int
size, long id) {
+ this.byteBuffer = byteBuffer;
+ this.position = position;
+ this.size = size;
+ this.id = id;
+ }
+ }
+
+ class DispatchRequestOrderlyQueue {
+
+ DispatchRequest[][] buffer;
+
+ long ptr = 0;
+
+ AtomicLong maxPtr = new AtomicLong();
+
+ public DispatchRequestOrderlyQueue(int bufferNum) {
+ this.buffer = new DispatchRequest[bufferNum][];
+ }
+
+ public void put(long idx, DispatchRequest[] obj) {
+ while (ptr + this.buffer.length <= idx) {
+ synchronized (this) {
+ try {
+ this.wait();
+ } catch (InterruptedException e) {
+ throw new RuntimeException(e);
+ }
+ }
+ }
+ int mod = (int) (idx % this.buffer.length);
+ this.buffer[mod] = obj;
+ maxPtr.incrementAndGet();
+ }
+
+ public DispatchRequest[] get(List<DispatchRequest[]> rets) {
+ synchronized (this) {
+ for (int i = 0; i < this.buffer.length; i++) {
+ int mod = (int) (ptr % this.buffer.length);
+ DispatchRequest[] ret = this.buffer[mod];
+ if (ret == null) {
+ this.notifyAll();
+ return null;
+ }
+ rets.add(ret);
+ this.buffer[mod] = null;
+ ptr++;
+ }
+ }
+ return null;
+ }
+
+ public synchronized boolean isEmpty() {
+ return maxPtr.get() == ptr;
+ }
+
+ }
Review Comment:
> > And DispatchRequestOrderlyQueue#get always returns null, which looks
weird. Changed to the following form to be more object-oriented.
>
> How about I change it to void? Because it doesn't need a return value.
`public void get(List<DispatchRequest[]> rets)` seems like a function in C
code style to avoid returning local variables causing dangling pointer
problems. In Java, we are more accustomed to using the return value of the
`get` method.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
