Re: [libvirt] RFC: libvirt java bindings based on JNA

On Saturday 25 July 2009 13:56:36 Bryan Kearney wrote: > I would like to get some comments on an initial cut of the java bindings > on top of JNA[1]. They are not 100% complete (see below), but they are > good enough to be criticized. In addition, if there are features > additions to the API which people are interested in, I would appreciate > the feedback on that. Thanks for your work! I pulled from git, it compiles fine when provided with jna.jar - couldn't find that except in my Eclipse 3.4 path. When using it with my tiny test application (which works fine with the JNI version), it first complains that /etc/pki/CA/cacert.pem can not be found. As I installed libvirt from source, it's in /usr/local/..., working fine with JNI. So I did a symlink workaround for now.

But fixing that, it doesn't work either: libvir: error : invalid argument in could not parse connection URI exception caught:org.libvirt.LibvirtException: invalid argument in could not parse connection URI level:VIR_ERR_ERROR code:VIR_ERR_INVALID_ARG domain:VIR_FROM_NONE hasConn:false hasDom:false hasNet:false message:invalid argument in could not parse connection URI str1:invalid argument in %s str2:could not parse connection URI str3:null int1:0 int2:0 Code is: ... conn = new Connect("xen://node02", false); ... which works fine with JNI.

When I use the test class (directly on a node where libvirtd is running, or remote, it doesn't matter), connections to the test driver are refused, although some test information seems to be gathered, and connecting with virsh works perfectly:

node02:~# virsh --connect test:///default node02:~# java -cp libvirt-0.3.0pre.jar:jna.jar:. test libvir: Remote error : unable to connect to 'localhost': Connection refused exception caught:org.libvirt.LibvirtException: unable to connect to 'localhost': Connection refused level:VIR_ERR_ERROR code:VIR_ERR_SYSTEM_ERROR domain:VIR_FROM_REMOTE hasConn:false hasDom:false hasNet:false message:unable to connect to 'localhost': Connection refused str1:%s str2:unable to connect to 'localhost': Connection refused str3:null int1:-1 int2:-1 virNodeInfo.model:i686 virNodeInfo.memory:3145728 virNodeInfo.cpus:16 virNodeInfo.nodes:2 virNodeInfo.sockets:2 virNodeInfo.cores:2 virNodeInfo.threads:2 getHostName:node02.scripty.at getCapabilities:<capabilities> <host> <cpu> <arch>i686</arch> <features> <pae/> <nonpae/> </features> </cpu> <topology> <cells num='2'> <cell id='0'> <cpus num='8'> <cpu id='0'/> <cpu id='2'/> <cpu id='4'/> <cpu id='6'/> <cpu id='8'/> <cpu id='10'/> <cpu id='12'/> <cpu id='14'/> </cpus> </cell> <cell id='1'> <cpus num='8'> <cpu id='1'/> <cpu id='3'/> <cpu id='5'/> <cpu id='7'/> <cpu id='9'/> <cpu id='11'/> <cpu id='13'/> <cpu id='15'/> </cpus> </cell> </cells> </topology> </host> <guest> <os_type>hvm</os_type> <arch name='i686'> <wordsize>32</wordsize> <emulator>/usr/bin/test-hv</emulator> <domain type='test'> </domain> </arch> <features> <pae/> <nonpae/> </features> </guest> <guest> <os_type>xen</os_type> <arch name='i686'> <wordsize>32</wordsize> <emulator>/usr/bin/test-hv</emulator> <domain type='test'> </domain> </arch> <features> <pae/> <nonpae/> </features> </guest> </capabilities> getMaxVcpus:32 getType:Test getURI:test:// getVersion:2 getLibVirVersion:4006 conn.networkCreateXML: org.libvirt.Network@3d434234 conn.networkDefineXML: org.libvirt.Network@30f7f540 numOfDefinedNetworks:1 listDefinedNetworks:[Ljava.lang.String;@10b61fd1 -> deftest numOfNetworks:2 listNetworks:[Ljava.lang.String;@24e2dae9 -> createst -> default conn.domainDefineXML:org.libvirt.Domain@27ce2dd4 conn.domainCreateLinux:org.libvirt.Domain@5122cdb6 numOfDefinedDomains:1 listDefinedDomains:[Ljava.lang.String;@43ef9157 deftest numOfDomains:2 listDomains:[I@252f0999 -> 2 -> 1 networkLookupByName: deftest <============== FIXME ================> networkLookupByUUIDString: deftest virNetworkGetXMLDesc:<network> <name>deftest</name> <uuid>004b96e1-2d78-c30f-5aa5-f03c87d21e67</uuid> <forward dev='eth0' mode='nat'/> <bridge name='deftest' stp='on' forwardDelay='0' /> <ip address='192.168.88.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.88.128' end='192.168.88.253' /> </dhcp> </ip> </network> virNetworkGetAutostart:false virNetworkGetBridgeName:deftest virNetworkGetName:deftest virNetworkGetUUID:[I@443ecfff <============== FIXME ================> 004bffffff96ffffffe12d78ffffffc30f5affffffa5fffffff03cffffff87ffffffd21e67 virNetworkGetName:004b96e1-2d78-c30f-5aa5-f03c87d21e67 virNetworkDestroy: virNetworkCreate: virNetworkCreate (should error): libvir: Test error deftest: internal error Network is already running exception caught:org.libvirt.LibvirtException: internal error Network is already running level:VIR_ERR_ERROR code:VIR_ERR_INTERNAL_ERROR domain:VIR_FROM_TEST hasConn:false hasDom:false hasNet:false message:internal error Network is already running str1:internal error %s str2:Network is already running str3:null int1:0 int2:0 domainLookupByID: org.libvirt.Domain@a4a63d8 domainLookupByName: org.libvirt.Domain@19e0ff2f virDomainGetXMLDesc:<domain type='test' id='1'> <name>test</name> <uuid>d4bf820b-3c84-eebc-0947-98e00ed3c94f</uuid> <memory>8388608</memory> <currentMemory>2097152</currentMemory> <vcpu>2</vcpu> <os> <type arch='i686'>hvm</type> <boot dev='hd'/> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> </devices> </domain> virDomainGetAutostart:false virDomainGetConnect:org.libvirt.Connect@29173ef virDomainGetID:1 virDomainGetInfo:state:VIR_DOMAIN_RUNNING maxMem:8388608 memory:2097152 nrVirtCpu:2 cpuTime:1248783222588997000 virDomainGetMaxMemory:8388608 libvir: error : this function is not supported by the hypervisor: virDomainGetMaxVcpus virDomainGetName:test virDomainGetOSType:linux virDomainGetSchedulerType:[Ljava.lang.String;@3a860d49 virDomainGetSchedulerParameters:[Lorg.libvirt.SchedParameter;@18872380 Uint:weight:1696596736 VIR_DOMAIN_SCHED_FIELD_UINT:weight:0 virDomainGetUUID:[I@502bb514 <============== FIXME ================> ffffffd4ffffffbfffffff820b3cffffff84ffffffeeffffffbc0947ffffff98ffffffe00effffffd3ffffffc94f virDomainGetUUIDString:d4bf820b-3c84-eebc-0947-98e00ed3c94f libvir: error : invalid connection pointer in virConnectGetHostname null Fini! Am I doing something wron