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Driver.go
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Driver.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package knxnetip
import (
"context"
"github.com/rs/zerolog"
"net/url"
"github.com/apache/plc4x/plc4go/pkg/api"
apiModel "github.com/apache/plc4x/plc4go/pkg/api/model"
_default "github.com/apache/plc4x/plc4go/spi/default"
"github.com/apache/plc4x/plc4go/spi/options"
"github.com/apache/plc4x/plc4go/spi/transports"
"github.com/pkg/errors"
)
type Driver struct {
_default.DefaultDriver
log zerolog.Logger
_options []options.WithOption // Used to pass them downstream
}
func NewDriver(_options ...options.WithOption) *Driver {
customLogger := options.ExtractCustomLoggerOrDefaultToGlobal(_options...)
driver := &Driver{
log: customLogger,
_options: _options,
}
driver.DefaultDriver = _default.NewDefaultDriver(driver, "knxnet-ip", "KNXNet/IP", "udp", NewTagHandler())
return driver
}
func (d *Driver) CheckQuery(query string) error {
_, err := d.GetPlcTagHandler().ParseQuery(query)
return err
}
func (d *Driver) GetConnectionWithContext(ctx context.Context, transportUrl url.URL, transports map[string]transports.Transport, driverOptions map[string][]string) <-chan plc4go.PlcConnectionConnectResult {
// Get an the transport specified in the url
transport, ok := transports[transportUrl.Scheme]
if !ok {
ch := make(chan plc4go.PlcConnectionConnectResult, 1)
ch <- _default.NewDefaultPlcConnectionConnectResult(nil, errors.Errorf("couldn't find transport for given transport url %#v", transportUrl))
return ch
}
// Provide a default-port to the transport, which is used, if the user doesn't provide on in the connection string.
driverOptions["defaultUdpPort"] = []string{"3671"}
// Have the transport create a new transport-instance.
transportInstance, err := transport.CreateTransportInstance(
transportUrl,
driverOptions,
append(d._options, options.WithCustomLogger(d.log))...,
)
if err != nil {
ch := make(chan plc4go.PlcConnectionConnectResult, 1)
ch <- _default.NewDefaultPlcConnectionConnectResult(nil, errors.Errorf("couldn't initialize transport configuration for given transport url %#v", transportUrl))
return ch
}
// Create the new connection
connection := NewConnection(
transportInstance,
driverOptions,
d.GetPlcTagHandler(),
append(d._options, options.WithCustomLogger(d.log))...,
)
d.log.Trace().Str("transport", transportUrl.String()).Stringer("connection", connection).Msg("created new connection instance, trying to connect now")
return connection.ConnectWithContext(ctx)
}
func (d *Driver) SupportsDiscovery() bool {
return true
}
func (d *Driver) DiscoverWithContext(ctx context.Context, callback func(event apiModel.PlcDiscoveryItem), discoveryOptions ...options.WithDiscoveryOption) error {
return NewDiscoverer().Discover(ctx, callback, discoveryOptions...)
}