feat: add connection property for gRPC interceptor provider #4149
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Add a connection property for setting a gRPC interceptor provider to use for connections. This allows JDBC and PGAdapter users to set a gRPC interceptor that should be used for the underlying Spanner client. This property is a guarded property, as it dynamically invokes the constructor of the class that is specified in the connection URL. A user must set the Java System property ENABLE_GRPC_INTERCEPTOR_PROVIDER=true when using this connection property. It should only be enabled in applications where an untrusted user cannot modify the connection URL that is being used, as that would allow an untrusted user to dynamically invoke code on the application host.
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Add a connection property for setting a gRPC interceptor provider to use for connections. This allows JDBC and PGAdapter users to set a gRPC interceptor that should be used for the underlying Spanner client.
This property is a guarded property, as it dynamically invokes the constructor of the class that is specified in the connection URL. A user must set the Java System property ENABLE_GRPC_INTERCEPTOR_PROVIDER=true when using this connection property. It should only be enabled in applications where an untrusted user cannot modify the connection URL that is being used, as that would allow an untrusted user to dynamically invoke code on the application host.