dosubot[bot] commented on issue #2530:
URL:
https://github.com/apache/incubator-hugegraph/issues/2530#issuecomment-2069009628
<!-- Answer -->
To address the issue with the `client.post()` method and guide you on how to
dynamically create a graph using the HugeGraph API, here's a focused approach:
1. **Resolve `java.net.UnknownHostException`**: This error indicates a
problem with network connectivity or DNS resolution. Ensure the HugeGraph
server URL is correct and accessible from your development environment. Verify
network settings, firewall configurations, and DNS resolution to ensure your
application can reach the HugeGraph server.
2. **Use `HugeClient.builder(url, graph)` for Client Configuration**:
Properly configure your `HugeClient` instance with the server URL, graph name,
and any necessary authentication details. Adjust connection parameters as
needed, including timeout settings and SSL configurations if your server uses
SSL.
3. **Check Server and Client Dependencies**: Ensure the HugeGraph server is
correctly configured, especially if using RocksDB, and that all required client
dependencies are included in your project.
4. **Dynamic Graph Creation API Usage**:
- To dynamically create a graph, use the following method signature from
`GraphsAPI.java`:
```java
public Map<String, String> create(String name, String cloneGraphName,
String configText) {
RestHeaders headers = new
RestHeaders().add(RestHeaders.CONTENT_TYPE, "text/plain");
Map<String, Object> params = null;
if (StringUtils.isNotEmpty(cloneGraphName)) {
params = ImmutableMap.of("clone_graph_name", cloneGraphName);
}
RestResult result = this.client.post(joinPath(this.path(), name),
configText, headers, params);
return result.readObject(Map.class);
}
```
- Parameters:
- `name`: Name of the new graph.
- `cloneGraphName`: (Optional) Name of an existing graph to clone.
- `configText`: Configuration for the new graph.
This method checks the API version for compatibility and uses the
`client.post()` method with appropriate headers and parameters to create the
graph. Ensure your request includes the correct content type and any necessary
parameters, such as the name of an existing graph to clone, if applicable.
By following these steps and utilizing the provided API method, you should
be able to dynamically create graphs in HugeGraph without encountering the
`client.post()` method failure.
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<details>
<summary>
#### Details
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**Sources**
-
[hugegraph-client/src/main/java/org/apache/hugegraph/example/SingleExample.java](https://github.com/apache/incubator-hugegraph-toolchain/blob/master/hugegraph-client/src/main/java/org/apache/hugegraph/example/SingleExample.java)
-
[hugegraph-server/hugegraph-test/src/main/java/org/apache/hugegraph/api/BaseApiTest.java](https://github.com/apache/incubator-hugegraph/blob/master/hugegraph-server/hugegraph-test/src/main/java/org/apache/hugegraph/api/BaseApiTest.java)
-
[hugegraph-client/src/main/java/org/apache/hugegraph/driver/HugeClientBuilder.java](https://github.com/apache/incubator-hugegraph-toolchain/blob/master/hugegraph-client/src/main/java/org/apache/hugegraph/driver/HugeClientBuilder.java)
-
[hugegraph-hubble/hubble-be/src/main/java/org/apache/hugegraph/util/HugeClientUtil.java](https://github.com/apache/incubator-hugegraph-toolchain/blob/master/hugegraph-hubble/hubble-be/src/main/java/org/apache/hugegraph/util/HugeClientUtil.java)
-
[hugegraph-client/src/main/java/org/apache/hugegraph/exception/ServerException.java](https://github.com/apache/incubator-hugegraph-toolchain/blob/master/hugegraph-client/src/main/java/org/apache/hugegraph/exception/ServerException.java)
-
[hugegraph-client/src/main/java/org/apache/hugegraph/api/graphs/GraphsAPI.java](https://github.com/apache/incubator-hugegraph-toolchain/blob/master/hugegraph-client/src/main/java/org/apache/hugegraph/api/graphs/GraphsAPI.java)
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