#!/usr/bin/env python
#
# Copyright (c) 2016 Cisco and/or its affiliates.
# Licensed 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:
#
# http://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.
import os
import callback_gen
import util
from string import Template
notification_registry_template = Template("""
package $plugin_package.$notification_package;
/**
* <p>Registry for notification callbacks defined in ${plugin_name}.
* <br>It was generated by notification_gen.py based on $inputfile
* <br>(python representation of api file generated by vppapigen).
*/
public interface ${plugin_name}EventRegistry extends $base_package.$notification_package.EventRegistry {
$register_callback_methods
@Override
void close();
}
""")
global_notification_callback_template = Template("""
package $plugin_package.$notification_package;
/**
* <p>Aggregated callback interface for notifications only.
* <br>It was generated by notification_gen.py based on $inputfile
* <br>(python representation of api file generated by vppapigen).
*/
public interface Global${plugin_name}EventCallback$callbacks {
}
""")
notification_registry_impl_template = Template("""
package $plugin_package.$notification_package;
/**
* <p>Notification registry delegating notification processing to registered callbacks.
* <br>It was generated by notification_gen.py based on $inputfile
* <br>(python representation of api file generated by vppapigen).
*/
public final class ${plugin_name}EventRegistryImpl implements ${plugin_name}EventRegistry, Global${plugin_name}EventCallback {
// TODO add a special NotificationCallback interface and only allow those to be registered
private final java.util.concurrent.ConcurrentMap<Class<?>, $base_package.$callback_package.JVppCallback> registeredCallbacks =
new java.util.concurrent.ConcurrentHashMap<>();
private static java.util.logging.Logger LOG = java.util.logging.Logger.getLogger(${plugin_name}EventRegistryImpl.class.getName());
$register_callback_methods
$handler_methods
@Override
public void close() {
registeredCallbacks.clear();
}
@Override
public void onError(io.fd.vpp.jvpp.VppCallbackException ex) {
java.util.logging.Logger LOG = java.util.logging.Logger.getLogger(${plugin_name}EventRegistryImpl.class.getName());
LOG.log(java.util.logging.Level.WARNING, String.format("Received onError exception: call=%s, context=%d, retval=%d%n", ex.getMethodName(),
ex.getCtxId(), ex.getErrorCode()), ex);
}
}
""")
register_callback_impl_template = Template("""
public java.lang.AutoCloseable register$callback(final $plugin_package.$callback_package.$callback callback){
if(null != registeredCallbacks.putIfAbsent($plugin_package.$dto_package.$notification.class, callback)){
throw new IllegalArgumentException("Callback for " + $plugin_package.$dto_package.$notification.class +
"notification already registered");
}
return () -> registeredCallbacks.remove($plugin_package.$dto_package.$notification.class);
}
""")
handler_impl_template = Template("""
@Override
public void on$notification(
final $plugin_package.$dto_package.$notification_reply notification) {
if (LOG.isLoggable(java.util.logging.Level.FINE)) {
LOG.fine(String.format("Received $notification event message: %s", notification));
}
final $base_package.$callback_package.JVppCallback jVppCallback = registeredCallbacks.get($plugin_package.$dto_package.$notification.class);
if (null != jVppCallback) {
(($plugin_package.$callback_package.$callback) registeredCallbacks
.get($plugin_package.$dto_package.$notification.class))
.on$notification(notification);
}
}
""")
notification_provider_template = Template("""
package $plugin_package.$notification_package;
/**
* Provides ${plugin_name}EventRegistry.
* <br>The file was generated by notification_gen.py based on $inputfile
* <br>(python representation of api file generated by vppapigen).
*/
public interface ${plugin_name}EventRegistryProvider extends $base_package.$notification_package.EventRegistryProvider {
@Override
public ${plugin_name}EventRegistry getEventRegistry();
}
""")
def generate_notification_registry(func_list, base_package, plugin_package, plugin_name, notification_package, callback_package, dto_package, inputfile):
""" Generates notification registry interface and implementation """
print "Generating Notification interfaces and implementation"
if not os.path.exists(notification_package):
os.mkdir(notification_package)
callbacks = []
register_callback_methods = []
register_callback_methods_impl = []
handler_methods = []
for func in func_list:
if not util.is_reply(func['name']) and not util.is_notification(func['name']):
continue
camel_case_name_with_suffix = util.underscore_to_camelcase_upper(func['name'])
if util.is_control_ping(camel_case_name_with_suffix):
continue
notification_dto = camel_case_name_with_suffix
callback_ifc = camel_case_name_with_suffix + callback_gen.callback_suffix
fully_qualified_callback_ifc = "{0}.{1}.{2}".format(plugin_package, callback_package, callback_ifc)
callbacks.append(fully_qualified_callback_ifc)
# TODO create NotificationListenerRegistration and return that instead of AutoCloseable to better indicate
# that the registration should be closed
register_callback_methods.append("java.lang.AutoCloseable register{0}({1} callback);"
.format(callback_ifc, fully_qualified_callback_ifc))
register_callback_methods_impl.append(register_callback_impl_template.substitute(plugin_package=plugin_package,
callback_package=callback_package,
dto_package=dto_package,
notification=camel_case_name_with_suffix,
callback=callback_ifc))
handler_methods.append(handler_impl_template.substitute(base_package=base_package,
plugin_package=plugin_package,
callback_package=callback_package,
dto_package=dto_package,
notification=notification_dto,
notification_reply=camel_case_name_with_suffix,
callback=callback_ifc))
callback_file = open(os.path.join(notification_package, "%sEventRegistry.java" % plugin_name), 'w')
callback_file.write(notification_registry_template.substitute(inputfile=inputfile,
register_callback_methods="\n ".join(register_callback_methods),
base_package=base_package,
plugin_package=plugin_package,
plugin_name=plugin_name,
notification_package=notification_package))
callback_file.flush()
callback_file.close()
callback_file = open(os.path.join(notification_package, "Global%sEventCallback.java" % plugin_name), 'w')
global_notification_callback_callbacks = ""
if (callbacks):
global_notification_callback_callbacks = " extends " + ", ".join(callbacks)
callback_file.write(global_notification_callback_template.substitute(inputfile=inputfile,
callbacks=global_notification_callback_callbacks,
plugin_package=plugin_package,
plugin_name=plugin_name,
notification_package=notification_package))
callback_file.flush()
callback_file.close()
callback_file = open(os.path.join(notification_package, "%sEventRegistryImpl.java" % plugin_name), 'w')
callback_file.write(notification_registry_impl_template.substitute(inputfile=inputfile,
callback_package=callback_package,
dto_package=dto_package,
register_callback_methods="".join(register_callback_methods_impl),
handler_methods="".join(handler_methods),
base_package=base_package,
plugin_package=plugin_package,
plugin_name=plugin_name,
notification_package=notification_package))
callback_file.flush()
callback_file.close()
callback_file = open(os.path.join(notification_package, "%sEventRegistryProvider.java" % plugin_name), 'w')
callback_file.write(notification_provider_template.substitute(inputfile=inputfile,
base_package=base_package,
plugin_package=plugin_package,
plugin_name=plugin_name,
notification_package=notification_package))
callback_file.flush()
callback_file.close()