On Windows Server 2016, we are trying to connect over JDBC with a Jython script but it is giving following error:
java.lang.ClassNotFoundException: java.lang.ClassNotFoundException:
com.microsoft.sqlserver.jdbc.SQLServerDriver
RazorSQL, on the same machine, connects without error using these settings:
Driver Class: com.microsoft.sqlserver.jdbc.SQLServerDriver
Driver Location: \Program Files (x86)\RazorSQL\drivers\sqlserver\sqljdbc.jar
As a result, we set the CLASSPATH to same location with this command:
set CLASSPATH=C:\Program Files (x86)\RazorSQL\drivers\sqlserver\sqljdbc.jar
...but when running the code below - we still get the same ClassNotFound error.
This is our Python code:
jclassname = "com.microsoft.sqlserver.jdbc.SQLServerDriver"
database = "our_database_name"
db_elem = ";databaseName={}".format(database) if database else ""
host = "###.##.###.###" # ip address
port = "1433"
user = "user_name"
password = "password"
url = (
jdbc:sqlserver://{host}:{port}{db_elem}"
";user={user};password={password}".format(
host=host, port=port, db_elem=db_elem,
er=user, password=password)
)
print url
driver_args = [url]
jars = None
libs = None
db = jaydebeapi.connect(jclassname, driver_args, jars=jars,
libs=libs)
This is how we are running our Python script:
C:\jython2.7.0\bin\jython.exe C:\path_to_our_script.py
How is that RazorSQL is connecting fine - but somehow Python cannot? How do we remove this CLASSPATH error?
You have to load the JARs at runtime using the system Classloader.
Please refer to this answer.
The following code snippet has been taken from this Gist.
def loadJar(jarFile):
'''load a jar at runtime using the system Classloader (needed for JDBC)
adapted from http://forum.java.sun.com/thread.jspa?threadID=300557
Author: Steve (SG) Langer Jan 2007 translated the above Java to Jython
Reference: https://wiki.python.org/jython/JythonMonthly/Articles/January2007/3
Author: seansummers#gmail.com simplified and updated for jython-2.5.3b3+
>>> loadJar('jtds-1.3.1.jar')
>>> from java import lang, sql
>>> lang.Class.forName('net.sourceforge.jtds.jdbc.Driver')
<type 'net.sourceforge.jtds.jdbc.Driver'>
>>> sql.DriverManager.getDriver('jdbc:jtds://server')
jTDS 1.3.1
'''
from java import io, net, lang
u = io.File(jarFile).toURL() if type(jarFile) <> net.URL else jarFile
m = net.URLClassLoader.getDeclaredMethod('addURL', [net.URL])
m.accessible = 1
m.invoke(lang.ClassLoader.getSystemClassLoader(), [u])
if __name__ == '__main__':
import doctest
doctest.testmod()
Also look at - https://wiki.python.org/jython/JythonMonthly/Articles/January2007/3
I want to execute the following query with JavaClient.
{
"suggest": {
"my-suggestion-1": {
"text": "sample",
"completion": {
"field": "suggest1",
"size": 10
}
}
}
}
I could not find the document.
Please let me know the URL of the document.
Also, how should I implement it?
Someone, please lend me your wisdom.
Environment
Language: Java 8
Framework: Spring
Elasticsearch client (jar) ver
Org.elasticsearch: 5.1.1
Org.elasticsearch.client: 5.1.1
Elasticsearch's ver: 5.3.1
Try something like
TermSuggestionBuilder termSuggestionBuilder = SuggestBuilders.termSuggestion("field_name").text("my suggest terms");
client.prepareSearch("my_index").setSize(0).suggest(new SuggestBuilder().addSuggestion("foo", termSuggestionBuilder)).get();
A good thing to do is usually to check the Elasticsearch tests itself, like the CompletionSuggestSearchIT
I've just upgraded to ES 2.0.0-rc1.
I use a local node for JUnit testing.
Settings settings = Settings.builder()
.put("script.inline", "on")
.put("script.indexed", "on")
.put("path.home", "/").build();
return NodeBuilder.nodeBuilder()
.settings(settings)
.local(true)
.clusterName("c").node();
My problem is that the upgraded version doesn't see my native scripts.
The query seems like this:
Script script = new Script("myscript", ScriptType.INDEXED, "native", params);
ScoreFunctionBuilder scoreBuilder = ScoreFunctionBuilders.scriptFunction(script);
The output is the following:
...
"functions" : [ {
"script_score" : {
"script" : {
"id" : "myscript",
"lang" : "native",
"params" : {
"searchMode" : "A"
}
}
}
...
This script Plugin is in the Maven dependency list.
It worked well with the former version however with this new version I get the following exception:
Caused by: org.elasticsearch.index.query.QueryParsingException: script_score the script could not be loaded
Caused by: org.elasticsearch.index.IndexNotFoundException: no such index
So how could I install the plugin to a local node?
Edit 1:
https://www.elastic.co/guide/en/elasticsearch/plugins/2.0/plugin-authors.html / Loading plugins from the classpath
might be the solution. Nope.
Edit 2:
It seems that the ScoreFunctionBuilder has been changed.
1.7:
ScoreFunctionBuilder scoreBuilder = ScoreFunctionBuilders.scriptFunction("myscript", "native", params);
2.0:
Script script = new Script("myscript", ScriptType.INDEXED, "native", params);
ScoreFunctionBuilder scoreBuilder = ScoreFunctionBuilders.scriptFunction(script);
However this doesn't fits to native scripts.
I don't know why since it doesn't follow any logic but all you need to do is to use ScriptType.INLINE
Script script = new Script("myscript", ScriptType.INLINE, "native", params);
We can't use INDEXED because elasticsearch will look for an indexed script in its system and since our script isn't indexed per say... it wouldn't work.
Anyone have a snippet of how to use the vSphere VI Java API to extract the values in the 'Annotations' section of the 'Summary' tab for a VM? I have looked around a lot as well as combed through the API docs but haven't seen it anywhere.
Have a look at the API Documentation of VirtualMachineConfigSpec first .
Then you can do this from java
VirtualMachineConfigSpec configSpec = new VirtualMachineConfigSpec();
configSpec.setAnnotation = "Your annotation string here"
reconfigVM_Task(vmMOR, configSpec);
I did this in Perl SDK, but re-doing it to use Java API should be easy.
You get the annotations from Virtual Machine object which has property named summary of class VirtualMachineSummary which has config of class VirtualMachineConfigSummary which has a annotation field of type string which is what you need.
my $vmname = "vmname you are looking for";
# Get all VMs
my $vms = Vim::find_entity_views(
view_type => 'VirtualMachine',
filter => {"config.name" => qr/^$vmname$/i},
);
# Iterate over the VMs, getting their annotations
foreach my $vm (#{ $vms }) {
my $notes = $vm->summary->config->annotation;
my $name = $vm->summary->config->name;
if (not defined $notes) {
print " - VM: $name has no notes\n";
}
elsif ($notes =~ m/^\$*/) {
print " - VM: $name has empty notes\n";
}
else {
print " - VM: $name notes: '$notes'\n";
}
}
Here is the full code: https://communities.vmware.com/message/2613855#2613855
Goal: check java's version on a machine (I can get this from java -version). Compare it with latest available from java website
I would like to know if there is any way I can check for latest Java releases assuming that I have JRE/JDK installed on a machine.
If I can do this through Java itself, my solution would become platform independent. I could use java.net.URL class to send a request to Java website and get the HTML, however the response would be dynamic as Oracle can change their website and styles and possibly will have maintenance issues in long run.
I have looked at javatester.org, but I would not want it through an applet but through command line (which I can add to a script).
Through javacpl.exe, I can schedule periodic checks, but I would like to do it on demand.
The answer is actually quite simple. http://java.com/en/download/testjava.jsp issues a request to http://java.com/applet/JreCurrentVersion2.txt. That file currently contains a single version number: '1.7.0_11'...which is the latest and greatest, indeed.
Java code example
try (BufferedReader br = new BufferedReader(new InputStreamReader(new URL(
"http://java.com/applet/JreCurrentVersion2.txt").openStream()))) {
String fullVersion = br.readLine();
String version = fullVersion.split("_")[0];
String revision = fullVersion.split("_")[1];
System.out.println("Version " + version + " revision " + revision);
} catch (IOException e) {
// handle properly
}
Update 2014-03-20
Eventhough Java 8 was recently released http://java.com/applet/JreCurrentVersion2.txt currently still returns 1.7.0_51.
Update 2016-07-13
Looks like we need to come back to this every few months... Currently you need to scan http://java.com/en/download/installed8.jsp for a JavaScript variable latest8Version. So, you could run curl -s https://java.com/en/download/installed8.jsp | grep latest8Version.
Update 2018-08-19
http://javadl-esd-secure.oracle.com/update/baseline.version is another hot spot as mentioned in some other answer.
An URL very similar to the now defunct "JreCurrentVersion2.txt":
http://javadl-esd-secure.oracle.com/update/baseline.version
The contents of the link look like this:
1.8.0_111
1.7.0_121
1.6.0_131
1.5.0_99
1.4.2_43
You can easily parse the contents to find the latest JRE versions.
UPDATE: I don't recommend this method because this JRE is the one that has the Ask.com toolbar. You're better off downloading it yourself and distributing it yourself.
The jusched.exe program accesses the following URL to find out what versions are available. I think it's less likely to change because jusched is installed on millions of computers.
https://javadl-esd-secure.oracle.com/update/1.7.0/map-m-1.7.0.xml
Here is a snippet of what it returns for me:
<?xml version="1.0" encoding="ISO-8859-1" standalone="yes" ?>
<java-update-map version="1.0">
<mapping>
<version>1.7.0_17</version>
<url>https://javadl-esd-secure.oracle.com/update/1.7.0/au-descriptor-1.7.0_25-b17.xml</url>
</mapping>
<mapping>
<version>1.7.0_21</version>
<url>https://javadl-esd-secure.oracle.com/update/1.7.0/au-descriptor-1.7.0_25-b17.xml</url>
</mapping>
</java-update-map>
To get the actual version that it is pointing to you have to fetch the above URL. Here is another snippet of what this XML looks like:
xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!-- XML file to be staged anywhere, and pointed to by map.xml file -->
<java-update>
<information version="1.0" xml:lang="en">
<caption>Java Update - Update Available</caption>
<title>Java Update Available</title>
<description>Java 7 Update 25 is ready to install. Installing Java 7 Update 25 might uninstall the latest Java 6 from your system. Click the Install button to update Java now. If you wish to update Java later, click the Later button.</description>
<moreinfo>http://java.com/moreinfolink</moreinfo>
<AlertTitle>Java Update Available</AlertTitle>
<AlertText>A new version of Java is ready to be installed.</AlertText>
<moreinfotxt>More information...</moreinfotxt>
<url>http://javadl.sun.com/webapps/download/GetFile/1.7.0_25-b17/windows-i586/jre-7u25-windows-i586-iftw.exe</url>
<version>1.7.0_25-b17</version>
<post-status>https://nometrics.java.com</post-status>
<cntry-lookup>http://rps-svcs.sun.com/services/countrylookup</cntry-lookup>
<predownload></predownload>
<options>/installmethod=jau FAMILYUPGRADE=1 SPWEB=http://javadl-esd.sun.com/update/1.7.0/sp-1.7.0_25-b17</options>
<urlinfo>24595ec7f861bc67e572f1e4ad3992441335e1a7</urlinfo>
</information>
</java-update>
The version tag contains the full version number.
You could parse the Java SE Downloads page to extract the Java versions.
That way, you get the version of both JDK6 and JDK7, which allows you to test your particular JDK (6 or 7) against the latest Oracle one.
(As opposed to the Free Java Download page, which only lists the JDK7)
Her is a crude script in Go, which you can compile on Windows, Unix, MacOs into a single independent executable, and use within a command line or a script:
package main
import (
"bytes"
"encoding/xml"
"fmt"
"io/ioutil"
"net/http"
"os/exec"
"regexp"
)
type Jdk struct {
Url string
Ver string
update string
}
func main() {
resp, err := http.Get("http://www.oracle.com/technetwork/java/javase/downloads/index.html")
if err != nil {
fmt.Printf("Error on http Get: %v\n", err)
return
}
bodyb, err := ioutil.ReadAll(resp.Body)
if err != nil {
fmt.Printf("QueriesForOwner: error in ReadAll: %v\n", err)
return
}
br := bytes.NewBuffer(bodyb)
jdkre, err := regexp.Compile(`h3[^\r\n]+(/technetwork/java/javase/downloads/(jdk(?:6|7)(?:u(\d+))?)-downloads-\d+\.html)`)
if err != nil {
fmt.Printf("extract: error in regexp compilation: %v\n", err)
return
}
jdks := jdkre.FindAllSubmatch(br.Bytes(), -1)
jdk7 := Jdk{string(jdks[0][4]), string(jdks[0][5]), string(jdks[0][6])}
jdk6 := Jdk{string(jdks[1][7]), string(jdks[1][8]), string(jdks[1][9])}
fmt.Printf("Jdk7: %v\nJdk6: %v\n", jdk7, jdk6)
jver, err := exec.Command("java", "-version").CombinedOutput()
if err != nil {
fmt.Printf("*ExitError from java -version:", err)
return
}
fmt.Println("JVer: '", string(jver), "'")
jverre, err := regexp.Compile(`1.(\d).\d(?:_(\d+))"`)
jvers := jverre.FindSubmatch(jver)
jj := string(jvers[0])
jv := string(jvers[1])
ju := string(jvers[2])
jdk := jdk6
if jv == "7" {
jdk = jdk7
}
if jdk.update != ju {
fmt.Println("Local JDK *NOT* up-to-date: you have ", jj, ", Oracle has ", jdk.Ver)
} else {
fmt.Println("Local JDK *up-to-date*: you have ", jj, ", equals to Oracle, which has", jdk.Ver)
}
}
Again, this is a crude script, oriented toward JDK, and you would need to adapt it to your specific need, making its output and exit status match what you need for your script.
On my (PC) workstation, it returns:
Jdk7: {/technetwork/java/javase/downloads/jdk7u9-downloads-1859576.html jdk7u9 9}
Jdk6: {/technetwork/java/javase/downloads/jdk6u37-downloads-1859587.html jdk6u37 37}
JVer: ' java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b05)
Java HotSpot(TM) Client VM (build 20.6-b01, mixed mode, sharing)
'
Local JDK *NOT* up-to-date: you have 1.6.0_31" , Oracle has jdk6u37
I don't know what information you are exactly looking for, but you can get some version information using
System.getProperty("java.version");
If this is not what you're looking for, check the other available properties here:
http://docs.oracle.com/javase/6/docs/api/java/lang/System.html#getProperties()
As for the latest available version, I guess you'd have to parse this site manually:
http://java.com/en/download/index.jsp
The latest version is on there, currently it's
Version 7 Update 9
You write that this is not what you want because "Oracle can change their website and styles". However, you want to find out the latest version of Java by accessing their service (website in this case). As long as you're not paying for this, they have no obligation to you, and can change the service whenever they want without your consent. And even when you're a paying customer, the best you can hope for is that they will inform you of upcoming changes, and your maintenance issues will remain.
Remember, it's THEIR service you want to use.
I have solved a similar issue some time ago with this groovy script (disclaimer: is somehow a "toy" script):
#Grapes([
#Grab(group='org.ccil.cowan.tagsoup', module='tagsoup', version='1.2.1')
])
def slurper = new XmlSlurper(new org.ccil.cowan.tagsoup.Parser())
def url = new URL("http://www.java.com/download/manual.jsp")
def html
url.withReader { reader ->
html = slurper.parse(reader)
}
def lastJava = html.body.div.div.div.strong.text()
println "Last available java version: ${lastJava}"
println "Currently installed java version: ${System.properties["java.version"]}"
It yields something like:
Last available java version:
Version 7 Update 9
Currently installed java version: 1.7.0_07
If you want to avoid maintenance issues due to changes to the page structure, maybe a better option is to search for a line containing "Version x Update y".
To get all system variables
Properties properties = System.getProperties();
System.out.println(properties);
Sample output, this might be different in your system depending on your OS and Java JDK/JRE version.
{
java.runtime.name = Java(TM) SE Runtime Environment,
sun.boot.library.path = C:\Program Files\Java\jdk1.8.0_31\jre\bin,
java.vm.version = 25.31-b07,
java.vm.vendor = Oracle Corporation,
java.vendor.url = http://java.oracle.com/,
path.separator = ;,
idea.launcher.port = 7534,
java.vm.name = Java HotSpot(TM) 64-Bit Server VM,
file.encoding.pkg = sun.io,
user.country = NP,
user.script = ,
sun.java.launcher = SUN_STANDARD,
sun.os.patch.level = ,
java.vm.specification.name = Java Virtual Machine Specification,
user.dir = C:\Users\...\roid,
java.runtime.version = 1.8.0_31-b13,
java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment,
java.endorsed.dirs = C:\Program Files\Java\jdk1.8.0_31\jre\lib\endorsed,
os.arch = amd64,
java.io.tmpdir = C:\Windows\TEMP\,
line.separator = ,
java.vm.specification.vendor = Oracle Corporation,
user.variant = ,
os.name = Windows 8.1,
sun.jnu.encoding = Cp1252,
java.library.path = C:\Program...roid,
java.specification.name = Java Platform API Specification,
java.class.version = 52.0,
sun.management.compiler = HotSpot 64-Bit Tiered Compilers,
os.version = 6.3,
user.home = C:\Users\Xxx,
user.timezone = Asia/Kathmandu,
java.awt.printerjob = sun.awt.windows.WPrinterJob,
file.encoding = UTF-8,
idea.launcher.bin.path = C:\Program Files (x86)\xxx\bin,
java.specification.version = 1.8,
java.class.path = C:\Program Files\Java\jdk1.8.0_31\jre\lib\charsets.jar;...,
user.name = Xxx,
java.vm.specification.version = 1.8,
sun.java.command = com.xxxx.ameras,
java.home = C:\Program Files\Java\jdk1.8.0_31\jre,
sun.arch.data.model = 64,
user.language = en,
java.specification.vendor = Oracle Corporation,
awt.toolkit = sun.awt.windows.WToolkit,
java.vm.info = mixed mode,
java.version = 1.8.0_31,
java.ext.dirs = C:\Program Files\Java\jdk1.8.0_31\jre\lib\ext;...,
java.vendor = Oracle Corporation,
file.separator = \,
java.vendor.url.bug = http://bugreport.sun.com/bugreport/,
sun.io.unicode.encoding = UnicodeLittle,
sun.cpu.endian = little,
sun.desktop = windows,
sun.cpu.isalist = amd64
}
Retrive only specific variable
String javaVersion = System.getProperty("java.version");
System.out.println(javaVersion);
Output
1.8.0_31
#MarcelStör's solution no longer works - the version in the file is 1.8.0_51, while the actual latest version is 1.8.0_91/92. If you go to the Java test page in Firefox or Chrome and open the development console you can get the variable latest8Version which currently is 1.8.0_91. This could be wrapped in a Selenium/Firefox solution, but is an incredibly hacky way of getting this information.
System.getProperty("java.vm.specification.version");
System.getProperty("java.version");