订阅

您可以创建具有订阅区域和域 ID 的订阅。域 ID 表示拥有该订阅区域的域。BoundingBox2F32 描述订阅区域。使用以下函数可创建订阅：

Result<SubscriptionHandle> CreateSubscriptionBoundingBox2F32(Transaction& txn, DomainId id, const BoundingBox2F32& boundingBox)

例 示例

Result<void> CreateSubscriptionInSpatialDomain(Transaction& transaction)
{
    WEAVERRUNTIME_TRY(Api::PartitionSet partitionSet, Api::AllPartitions(transaction)); 
    
    Api::DomainId spatialDomainId;

    for (const Api::Partition& partition : partitionSet.partitions)
    {
        if (partition.domain_type == Api::DomainType::Spatial)
        {
            /**
            * Get the spatial domain ID.
            */
            spatialDomainId = partition.domain_id;
            break;
        }
    }
    
    constexpr Api::BoundingBox2F32 subscriptionBounds { 
        /* min */ { /* x */ 0, /* y */ 0 }, 
        /* max */ { /* x */ 1000, /* y */ 1000 } }

    WEAVERRUNTIME_TRY(
        Api::SubscriptionHandle subscriptionHandle,
        Api::CreateSubscriptionBoundingBox2F32(
        transaction,
        spatialDomainId,
        subscriptionBounds));
        
    return Success();
}

您可以使用 CreateSubscriptionBoundingBox2F32() 返回的 Api::SubscriptionHandle 来修改订阅。您可以将其作为参数传递给以下函数：

Result<void> ModifySubscriptionBoundingBox2F32(Transaction& txn, SubscriptionHandle handle, const BoundingBox2F32& boundingBox)

Result<void> DeleteSubscription(Transaction& txn, SubscriptionHandle handle)