Writing gdbus client for Bluez BLE (verison 5.48)
Using gdbus-codegen tool to generate proxy and skeleton.
XML Content has below details.
<interface name="org.bluez.LEAdvertisement1">
<method name="Release">
<annotation name="org.freedesktop.DBus.Method.NoReply" value="true"/>
</method>
<annotation name="org.freedesktop.DBus.Properties.PropertiesChanged" value="const"/>
<property name="Type" type="s" access="read"/>
<property name="ServiceUUIDs" type="as" access="read"/>
<property name="ManufacturerData" type="a{qv}" access="read"/>
<property name="SolicitUUIDs" type="as" access="read"/>
<property name="Includes" type="as" access="read"/>
<property name="ServiceData" type="a{sv}" access="read"/>
<property name="IncludeTxPower" type="b" access="read"/>
<property name="LocalName" type="s" access="read"/>
<property name="Appearance" type="q" access="read"/>
<property name="Duration" type="q" access="read"/>
<property name="Timeout" type="q" access="read"/>
</interface>
All above properties are getting assigned to default values from my client. As i introspect using d-feet.
But bluetoothctl these values are not assigned to default.
I debugged
bluez/src/Advertising.c function client_proxy_added()->parse_advertisement()
g_dbus_proxy_get_property returns TRUE for properties set by bluetoothctl, others it returns FALSE.
But with auto generated code, eventhough none of properties set. g_dbus_proxy_get_property is able to get all properties and default values its parsing. Due to the above facing below issues while starting Advertising.
1) Timeout default value is zero, it immediately timeout.
2) When include property is set, name property parsed eventhough not set.
bluez throws error "Local name already included".
How we can make same behavior as bluetoothctl with gdbus autogenerated code?
Related
<bean class="org.apache.ignite.configuration.CacheConfiguration">
<property name="name" value="mycache"/>
<!-- Configure query entities -->
<property name="queryEntities">
<list>
<bean class="org.apache.ignite.cache.QueryEntity">
<!-- Setting indexed type's key class -->
<property name="keyType" value="java.lang.Long"/>
<!-- Setting indexed type's value class -->
<property name="valueType"
value="org.apache.ignite.examples.Person"/>
<!-- Defining fields that will be either indexed or queryable.
Indexed fields are added to 'indexes' list below.-->
<property name="fields">
<map>
<entry key="id" value="java.lang.Long"/>
<entry key="name" value="java.lang.String"/>
<entry key="salary" value="java.lang.Long "/>
</map>
</property>
<!-- Defining indexed fields.-->
<property name="indexes">
<list>
<!-- Single field (aka. column) index -->
<bean class="org.apache.ignite.cache.QueryIndex">
<constructor-arg value="id"/>
</bean>
<!-- Group index. -->
<bean class="org.apache.ignite.cache.QueryIndex">
<constructor-arg>
<list>
<value>id</value>
<value>salary</value>
</list>
</constructor-arg>
<constructor-arg value="SORTED"/>
</bean>
</list>
</property>
</bean>
</list>
</property>
</bean>
I understand the above XML configuration can be used to define an SQL entity in ignite with indexes. The documentation is better understandable from a code perspective either Java or NET because API is available. As we do most of the development C++ and API is not available , we would like to know few more details to use the XML configuration. Could anyone please answer below points?
1.Where does this configuration file can be used? Server side or client side (thin & thick) or both side.
2.Is it possible to change the field names, types and indexes once it has been created and loaded data in the same entity?#
3.<property name="valueType" value="org.apache.ignite.examples.Person"/> If not mistaken, we understand the value here is taken from a namespace and from a DLL (for example in c#) but How does ignite knows about the location of DLL or namespace to get load from? where does the binaries to be kept?
4.In the case of C++ , what binary file can be used to define the value type? .lib or .dll or some other way.
C++ Thick Client can use the XML config, see IgniteConfiguration.springCfgPath.
Think about the CacheConfiguration as the "starting" config for a cache. Most of it can't be changed later. A few things, like the set of SQL columns or indexes, can be changed via SQL DDL: ALTER TABLE..., CREATE INDEX..., etc. If something isn't available in the DDL, assume that it can't be changed without recreating the cache.
Check out this. The value type name will be mapped by each platform component - Java, C++, .NET - accordingly to the binary marshaller configuration. For example, it's common to use BinaryBasicNameMapper that will map all platform type names (with namespaces/packages) to simple names, so that different namespace/package naming conventions don't create a problem. When a class is needed to deserialize a value, it will be loaded via the regular platform-specific mechanism to load code. For Java, it'll be the classpath. For C++, I guess it's LD_LIBRARY_PATH. In any case, Ignite has nothing to do with that really.
Again, Ignite has nothing to do with that. Whatever works on your platform to load code can be used.
After few experiments, I found the solution and actually it is easy.
The value given at the valueType property is directly mapped to the binary object name when it create from the code.
for e.g below configuration
<bean class="org.apache.ignite.configuration.CacheConfiguration">
<property name="name" value="TEST"/>
<property name="cacheMode" value="PARTITIONED"/>
<property name="atomicityMode" value="TRANSACTIONAL"/>
<property name="writeSynchronizationMode" value="FULL_SYNC"/>
<!-- Configure type metadata to enable queries. -->
<property name="queryEntities">
<list>
<bean class="org.apache.ignite.cache.QueryEntity">
<property name="keyType" value="java.lang.Long"/>
<property name="valueType" value="TEST"/>
<property name="fields">
<map>
<entry key="ID" value="java.lang.Long"/>
<entry key="DATE" value="java.lang.String"/>
</map>
</property>
</bean>
</list>
</property>
</bean>
the below C++ code works
template<>
struct BinaryType<examples::TEST> : BinaryTypeDefaultAll<examples::TEST>
{
static void GetTypeName(std::string& dst)
{
dst = "TEST";
}
static void Write(BinaryWriter& writer, const examples::RHO& obj)
{
writer.WriteInt64("ID", obj.Id);
writer.WriteString("DATE", obj.dt);
}
static void Read(BinaryReader& reader, examples::RHO& dst)
{
dst.Id = reader.ReadInt64("Id");
dst.dt = reader.ReadString("dt");
}
};
I am trying to modify default-config.xml by adding cacheConfiguration tags. Do i need to repeat cacheConfiguration XML tag for each data set RDD that i am tyring to keep to keep it in the memory ? Can i set backups to 0, if i don't want it.
ex:
<property name="cacheConfiguration">
<bean class="org.apache.ignite.configuration.CacheConfiguration">
<property name="name" value="TEST1_RDD"/>
<property name="cacheMode" value="PARTITIONED"/>
<property name="backups" value="0"/>
</bean>
</property> <property name="cacheConfiguration">
<bean class="org.apache.ignite.configuration.CacheConfiguration">
<property name="name" value="TEST2_RDD"/>
<property name="cacheMode" value="PARTITIONED"/>
<property name="backups" value="0"/>
</bean>
</property>
Also, do i need to specify explicitly write synchronization mode ? and by default which one Ignite consider ?
ex:
<property name="writeSynchronizationMode" value="FULL_SYNC"/>
Appreciate your response.
Yes, You have to write configuration for each cache as your cache may have different functionality/purpose and you have to set configuration according to it.
For backups it's default value is 0 and for CacheWriteSynchronizationMode default value is PRIMARY_SYNC
There is a possibility to define cache templates, if you don't want to provide the same configuration for caches: https://apacheignite.readme.io/docs/cache-template
I am using fuse 6.0 and activemq 5.8. Instead of defining activemq poolable connection factory in each bundle, it makes sense to define in a common bundle and expose it as osgi service. I created blue print file in FUSE_HOME/etc and opened an osgi service like this.
<osgix:cm-properties id="prop" persistent-id="xxx.xxx.xxx.properties" />
<bean id="jmsConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
<property name="brokerURL" value="${xxx.url}" />
<property name="userName" value="${xxx.username}" />
<property name="password" value="${xxx.password}" />
</bean>
<bean id="pooledConnectionFactory" class="org.apache.activemq.pool.PooledConnectionFactory" init-method="start" destroy-method="stop">
<property name="maxConnections" value="${maxconnections}" />
<property name="connectionFactory" ref="jmsConnectionFactory" />
</bean>
<service ref="pooledConnectionFactory" interface="javax.jms.ConnectionFactory">
<service-properties>
<entry key="name" value="localhost"/>
</service-properties>
</service>
and when i try to access this service in both blueprint files and spring text files like this
<reference id="pooledConnectionFactory" interface="javax.jms.ConnectionFactory"/>
bean id="jmsConfig" class="org.apache.camel.component.jms.JmsConfiguration">
<property name="connectionFactory" ref="pooledConnectionFactory"/>
<property name="concurrentConsumers" value="${xxx.concurrentConsumers}"/>
</bean>
<bean id="activemq" class="org.apache.activemq.camel.component.ActiveMQComponent">
<property name="configuration" ref="jmsConfig"/>
</bean>
but I am getting following expection during bundles startup.
Failed to add Connection ID:PLNL6237-55293-1401929434025-11:1201, reason: java.lang.SecurityException: User name [null] or password is invalid.
I even defined compendium definition in my bundles.
How can i solve this problem? any help is appreciated.
I found this online https://issues.apache.org/jira/i#browse/SM-2183
Do i need to upgrade?
It looks to me like you're using the property placeholders incorrectly. First of all, you should know what osgix:cm-properties only exposes the properties at the persistent id that you specify. You can treat it like a java.util.Properties object, and even inject it into a bean as one. This does however mean that it makes no attempt to resolve the properties.
To resolve properties, use spring's property placeholder configurer.
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="properties" ref="prop"/>
</bean>
P.S. The persistent id of cm-properties is the name of the file, not including the file type. You don't need the .properties at the end.
I use BoneCP in my Spring-based application.
<bean id="dataSource" class="com.jolbox.bonecp.BoneCPDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://ec2-23-21-211-???.compute-1.amazonaws.com:3306/?????" />
<property name="username" value="*****"/>
<property name="password" value="********"/>
<property name="idleConnectionTestPeriod" value="60"/>
<property name="idleMaxAge" value="240"/>
<property name="maxConnectionsPerPartition" value="3"/>
<property name="minConnectionsPerPartition" value="1"/>
<property name="partitionCount" value="1"/>
<property name="acquireIncrement" value="5"/>
<property name="statementsCacheSize" value="100"/>
<property name="releaseHelperThreads" value="3"/>
</bean>
Is there any short value for jdbcURL?
You can inject it via environmental variable through the CloudBees SDK.
1.Inject the datasource and the following environmental variables via bees app:bind
With the CloudBees SDK:
bees app:bind -a appName -db dbName -as mydb
It will automatically inject a datasource and will create these three environmental variables:
${DATABASE_URL_DB}
${DATABASE_USERNAME_DB}
${DATABASE_PASSWORD_DB}
Please, be aware that you will use on this way one active connection for the maxActive: '20' by default on the Tomcat JDBC Connection Pool.
2.Enable PlaceHolder on Spring framework and mark system-properties-mode as "OVERRIDE".
<context:property-placeholder location="classpath:spring/data-access.properties" system-properties-mode="OVERRIDE"/>
Example here.
3.On your datasource.xml configuration file, then you could use something like this:
value= "jdbc:"+ ${DATABASE_URL_DB}
Be aware that the recommended way to get the datasource on CloudBees is always using JNDI.
In this way, you will use our own implementation of the datasource, so you don't have to write the username, the password or the URL of the database. Instead of all these lines, you can just replace all of them for this one:
<jee:jndi-lookup id="dataSource" jndi-name="jdbc/mydb" resource-ref="true"/>
I am using Spring, Hibernate for CRUD operations and using Apache 'BasicDataSource' for connection pooling
Now the problem is when use below following configuration in datasource
<property name="maxActive" value="100"/>
<property name="maxWait" value="10000"/>
<property name="removeAbandoned" value="true"/>
<property name="removeAbandonedTimeout" value="60"/>
<property name="logAbandoned" value="true"/>
<property name="maxIdle" value="10"/>
than after using all connections I m getting Error of "Connection reset on log" but it takes long time to get back.
And if I m removing following lines from datasource
<property name="removeAbandoned" value="true"/>
<property name="removeAbandonedTimeout" value="60"/>
<property name="logAbandoned" value="true"/>
And adding below line to SessionFactory(hibernateProperties)
<prop key="hibernate.connection.release_mode">after_statement</prop>
than i getting no error on console but the problem is It uses the connection and close as soon as it completes.