I'm trying to find machines that publish a certain type of message. Therefore I'm inspecting the list of rosnodes rosnode.rosnode_listnodes() and would like to get the IP address of the corresponding machines running a specific node.
There is a method rosnode.lookup_uri(...), but I have no idea how to use it. I also looked into the rospy, rosgraph, names and network modules - so far without success. Among other information,rosnode.rosnode_info(node_name) prints the URI. But it might be a rather expensive method and, unfortunately, it returns None.
As huanxiner answered on ROS answers, you can use lookupNode from the rosgraph module as follows:
import rosgraph
master = rosgraph.Master("")
print master.lookupNode("node_name")
The result is something like this:
http://192.168.123.1:45678/
Related
I am using Node-red to connect to SFTP and to get a file.
Th Problem is that it returns always this error:
"Error: sftp.realPath: The "string" argument must be of type string or
an instance of Buffer or ArrayBuffer. Received type number
(1645531908336) 1645531908336"
Note: I did not get this error on "List" and i have tried many SFTP servers. Always the same error
this is the image of my node
1645531908336 looks like it is the timestamp from a standard msg.payload value from an inject node.
Assuming this is the node-red-contrib-better-sftp node then it looks like it is badly written and will always take the value of msg.payload and override any configured path and filename in the node config. This is a really bad design and should only use the input message if the value is left blank in the config.
https://github.com/sublime93/node-red-contrib-better-sftp/blob/10f67d46f3d762b254f7a6f22539ba4c95d6331e/transports/sftp/index.js#L148
So the quick option for you to test is to remove the msg.payload from the inject node you are testing with.
You should also raise an issue with the nodes author to fix this behaviour.
EDIT: There already is an open issue (from mid 2020) https://github.com/sublime93/node-red-contrib-better-sftp/issues/9
I can't find a way to search for TCPs / search TCP usages / renaming all TCPs.
Let's assume I have a 'licensePlate' TCP set up on the highest level of the hierarchy, and that I have 2 subfolders. In one of them I use the value as it is, in the other folder I change the value. I have some libraries using 'licensePlate'.
I then proceed to rename the TCP to 'carId' on the highest level (and in the libraries). The folder which inherited it will be updated. But the other one will now have two TCPs. This is illustrated in the figure below.
So at the moment I need to manually go into all my subfolders/testcases, find all of them where 'licensePlate' was re-configured, and: (1) set the value to the new param ('carId'); (2) delete the old param ('licensePlate').
The logic behind this imho is that I may still be using that param name (e.g. if I resolved my libraries). Still, I'm guessing that there must be a way to bulk-rename or at least to search for TCP usages (?)
That is really tricky and abstruse. You can find TCP usage with following TQL (Home - Search - TQL Search tab)
=>SUBPARTS[(param_name!="")]
where "param_name" is the name of your parameter.
And it seems that only usages are being found where values has been changed and are not default values.
I changed Change in persistence.xml
I also changed column definition (columnDefinition="XDB.XMLType") for xml fields
I checked OpenJpa(http://openjpa.208410.n2.nabble.com/Oracle-XMLType-fetch-problems-td6208344.html) site and IBM (http://www.ibm.com/support/knowledgecenter/SS7J6S_7.5.0/com.ibm.wsadapters.jca.jdbc.doc/env/doc/rjdb_problemsolutions.html)
My env is OpenJpa 2.0 and WAS 7
its throwing exception
org.apache.openjpa.persistence.PersistenceException: ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at "SYS.XMLTYPE", line 169
Please suggest without changing OpenJpa2.0 as its part of IBM WebSphere Application Server V7.0 how can i handle sys.XMLTYPE data, i am migrating my application from db2 to Oracle in same environment.
Writing XML data can be tricky some times! Getting the correct drivers and things defined properly can have its challenges. I can not say exactly what you need to do given the lack of info on your domain model and such, but let me give some general things to look for. First, there is an XML test in the OpenJPA test framework if you want to make reference to it. It can be seen publicly here:
https://apache.googlesource.com/openjpa/+/refs/heads/trunk/openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/jdbc/oracle/
Or, another test using an "XMLValueHandler" (likely this is beyond the scope of what you are looking for):
https://apache.googlesource.com/openjpa/+/refs/heads/trunk/openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/persistence/xmlmapping/query/
Second, (stating the obvious) I assume you have a column in Oracle defined as "XMLTYPE". Also, I see you are using schema SYS. I'm sure you are aware but this is a system/admin schema......just for sanity sake you might want to first get things running using a non-system/admin schema just so we don't get hung up with any issues with your OpenJPA client not having the correct permissions.
Next, you need the following definition:
#Lob #Basic
#Column(name = "ANXMLCOLUMN", columnDefinition="XMLCOLUMN XMLType")
private String anXMLString;
The #Lob I think will be necessary if you are using data greater than 4000 chars (this was mentioned in one of the comments). To start I'd use a very small set of data (a couple characters), once that works, then experiment with > 4k.
Next, make sure to use the correct JDBC driver. The last time I experimented with an XMLType I used the Oracle JDBC 11.2.0.2 driver.
Finally, you might need to use the property "openjpa.jdbc.DBDictionary" with value "oracle(supportsSetClob=true,maxEmbeddedClobSize=-1)". Again, experiment with this AND look at the OpenJPA documentation on these properties to determine if they are necessary in your scenario. I think the supportsSetClob=true will only be necessary for older version (pre-2.2.x) of OpenJPA. You might also need to use property "openjpa.jdbc.SchemaFactory" with value "native". I would suggest you first try without either or these two properties. If that doesn't help, then experiment with these two properties. I know this is vague, but I don't know what your DDL or domain model looks like so I have to keep in vague.
Thanks,
Heath Thomann
Is there a way to open a specified document, eg "production order 123" or form, eg "purchase orders" in Ax2012 from an external application directly?
In detail, I'm looking for something similiar like AXPath, but this doesn't work with versions greater then 2009.
Is there any ( maybe included ) way to achieve this?
There is! It's using AX's drilldown functionality which uses AxHLink.exe to handle dynamics:// URLs, which are passed to the Classes\SysStartupCmd function. You could also create some custom code there if you wanted to launch the AX client executable directly.
My question I asked some while back should have a great deal of useful information in it here:
What handles dynamics:// URLs?
Some more can be found: http://technet.microsoft.com/en-us/library/aa834337.aspx
EDIT:
It sounds like you are confused or the posts weren't clear enough. I think you have 3 basic options.
Dynamics:// URLs are handled by AxHLink.exe and they only seem to handle drilldown, viewalert, and viewalertrule. So if you want to use Dynamics:// URLs, you will need to hi-jack those somehow. There is a pastbin from Jan in that other stack post.
Create a custom URI handler and event poller (lot of work) see http://axcoder.blogspot.dk/2010/10/how-to-open-form-in-running-ax-from.html
Extend SysStartupCmd and then instead of using Dynamics:// URLs, just call Ax32.exe -startupCmd directly and a parameter can be passed to your custom class.
I am trying to use filters to select specific tables to replicate.
I tried running this with the installer
./tools/tungsten-installer --master-slave -a \
...
--svc-extractor-filters=replicate \
--property=replicator.filter.replicate.do=test,*.foo"
and got this exception in trepctl status after the master had not installed properly:
Plugin class name property is missing or null: key=replicator.filter.replicate
which file is this properties file? How do I find it? Moreover, in specifying the settings for the filter, how do I know what exactly to put?
I discovered that I am supposed to Modify the configuration template file prior to configuration according to Issue 219 but what changes am I supposed to make in tungsten-replicator-2.0.5-diff that will later on be patched to the extraction?
Issue 254 suggests that If you want to apply a filter out of the box, you can use these options with tungsten-installer:
-a --property=replicator.filter.Replicate.ignoreFilter=schema_x.tablex,schema_x,tabley,schema_y,tablez
--svc-thl-filter=Replicate
However when I try using this for --property=replicator.filter.replicate.do,
but the problem is still the same:
pendingExceptionMessage: Plugin class name property is missing or null: key=replicator.filter.replicate
Your assistance will be greatly appreciated.
Rumbi
Update:
Hi
I had a look at this file: /root/tungsten/tungsten-replicator/samples/
conf/filters/default/tableignore.tpl .Acoording to this sample, a
static-SERVICE_NAME.properties file is supposed to have something like
this configured, please confirm if this is the correct syntax:
replicator.filter.tabledo=com.continuent.tungsten.replicator.filter.JavaScr iptFilter
replicator.filter.tabledo.script=${replicator.home.dir}/samples/
scripts/javascript-advanced/tabledo.js
replicator.filter.tabledo.tables=foo(database).bar(table)
replicator.stage.thl-to-dbms.filters=tabledo
However, I did not find tabledo.js (or something similar) in the
directory where tableignore.js exists. Could I please have the
location of this file. If there is an alternative way of specifiying
--property=replicator.filter.replicate.do=test without the use of
this .js file, your suggestions are most welcome.
Download the latest version of tungsten replicator. The missing tpl file was added about a month ago. After installation, the filtered tables should be added to static-service.properties under the section FILTERS.
Locate your replicator configuration file in static-YOUR_SERVICE_NAME.properties, e.g.
/opt/continuent/tungsten/tungsten-replicator/conf/static-mysql2vertica.properties
Make sure the individual dbms properties are set, in particular the setting replicator.applier.dbms:
# Batch applier basic configuration information.
replicator.applier.dbms=com.continuent.tungsten.replicator.applier.batch.SimpleBatchApplier
replicator.applier.dbms.url=jdbc:mysql:thin://${replicator.global.db.host}:${replicator.global.db.port}/tungsten_${service.name}?createDB=true
replicator.applier.dbms.driver=org.drizzle.jdbc.DrizzleDriver
replicator.applier.dbms.user=${replicator.global.db.user}
replicator.applier.dbms.password=${replicator.global.db.password}
replicator.applier.dbms.startupScript=${replicator.home.dir}/samples/scripts/batch/mysql-connect.sql
# Timezone and character set.
replicator.applier.dbms.timezone=GMT+0:00
replicator.applier.dbms.charset=UTF-8
# Parameters for loading and merging via stage tables.
replicator.applier.dbms.stageTablePrefix=stage_xxx_
replicator.applier.dbms.stageDirectory=/tmp/staging
replicator.applier.dbms.stageLoadScript=${replicator.home.dir}/samples/scripts/batch/mysql-load.sql
replicator.applier.dbms.stageMergeScript=${replicator.home.dir}/samples/scripts/batch/mysql-merge.sql
replicator.applier.dbms.cleanUpFiles=false
Depending on the database you are replicating to you may have to omit/modify some of the lines.
For more information see:
https://code.google.com/p/tungsten-replicator/wiki/Replicator_Batch_Loading
I don't know if this problem is still open or not.
I am using this version 2.0.6-xxx and installing the service using the parameters works for me.
I would like to point it out, that as the parameter says "--svc-extractor-filters" defines an extractor filter. Meaning that the parameters will guide the extraction of data in the master server.
If you intend to use it on the slave service, you should use the "--svc-applier-filters".
The parameters
--svc-extractor-filters=replicate \
--property=replicator.filter.replicate.do=test,*.foo"
supposed to create the following in the properties file:
This is the filter set up.
replicator.filter.replicate=com.continuent.tungsten.replicator.filter.ReplicateFilter
replicator.filter.replicate.ignore=
replicator.filter.replicate.do=test,*.foo
And you should also be able to find the
replicator.stage.binlog-to-q.filters=replicate
parameter set.
If you intend to use this filter in the slave, please find the line with:
replicator.stage.q-to-dbms.filters=mysqlsessions,pkey,bidiSlave
and change it as
replicator.stage.q-to-dbms.filters=mysqlsessions,pkey,bidiSlave,replicate
Hope this brief description did help to you!