dosubot[bot] commented on issue #2605:
URL:
https://github.com/apache/incubator-hugegraph/issues/2605#issuecomment-2256452921
<!-- Answer -->
The `newPartition` method is called in the `PartitionService` class within
the `getPartitionByCode` method. Specifically, it is invoked when a partition
is not found for a given code, and a new partition needs to be created.
Here is the relevant code snippet:
```java
public Metapb.PartitionShard getPartitionByCode(String graphName, long code)
throws PDException {
if (code < 0 || code >= PartitionUtils.MAX_VALUE) {
throw new PDException(Pdpb.ErrorType.NOT_FOUND_VALUE, "code error");
}
// Find the partition ID based on the code, and if it doesn't find,
create a new partition
Metapb.Partition partition = partitionMeta.getPartitionByCode(graphName,
code);
if (partition == null) {
synchronized (this) {
if (partition == null) {
partition = newPartition(graphName, code);
}
}
}
Metapb.PartitionShard partShard = Metapb.PartitionShard.newBuilder()
.setPartition(partition)
.setLeader(storeService.getLeader(
partition, 0))
.build();
log.debug(
"{} Partition get code = {}, partition id = {}, start = {}, end
= {}， leader = {}",
graphName, (code), partition.getId(), partition.getStartKey(),
partition.getEndKey(), partShard.getLeader());
return partShard;
}
```
In this snippet, `newPartition` is called to handle the creation of a new
partition when the partition for the given code does not exist
<sup>[[1]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-pd/hg-pd-core/src/main/java/org/apache/hugegraph/pd/PartitionService.java)</sup><sup>[[2]](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-store/hg-store-core/src/main/java/org/apache/hugegraph/store/PartitionEngine.java)</sup>.
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