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<!---
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# Arrow Flight Java Package
Exposing Apache Arrow data on the wire.
[Protocol Description Slides](https://www.slideshare.net/JacquesNadeau5/apache-arrow-flight-overview)
[GRPC Protocol Definition](https://github.com/apache/arrow/blob/master/format/Flight.proto)
## Example usage
* Compile the java tree:
```
cd java
mvn clean install -DskipTests
```
* Go Into the Flight tree
```
cd flight/flight-core
```
* Start the ExampleFlightServer (supports get/put of streams and listing these streams)
```
mvn exec:exec
```
* In new terminal, run the TestExampleServer to populate the server with example data
```
cd arrow/java/flight/flight-core
mvn surefire:test -DdisableServer=true -Dtest=TestExampleServer
```
## Python Example Usage
* Compile example python headers
```
mkdir target/generated-python
pip install grpcio-tools # or conda install grpcio
python -m grpc_tools.protoc -I./src/main/protobuf/ --python_out=./target/generated-python --grpc_python_out=./target/generated-python ../../format/Flight.proto
```
* Connect to the Flight Service
```
cd target/generated-python
python
```
```
import grpc
import flight_pb2
import flight_pb2_grpc as flightrpc
channel = grpc.insecure_channel('localhost:12233')
service = flightrpc.FlightServiceStub(channel)
```
* List the Flight from Python
```
for f in service.ListFlights(flight_pb2.Criteria()): f
```
* Try to Drop
```
action = flight_pb2.Action()
action.type="drop"
service.DoAction(action)
```
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