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  • Dependency Injection into your Singleton

    - by Langali
    I have a singleton that has a spring injected Dao (simplified below): public class MyService<T> implements Service<T> { private final Map<String, T> objects; private static MyService instance; MyDao myDao; public void set MyDao(MyDao myDao) { this. myDao = myDao; } private MyService() { this.objects = Collections.synchronizedMap(new HashMap<String, T>()); // start a background thread that runs for ever } public static synchronized MyService getInstance() { if(instance == null) { instance = new MyService(); } return instance; } public void doSomething() { myDao.persist(objects); } } My spring config will probably look like this: <bean id="service" class="MyService" factory-method="getInstance"/> But this will instantiate the MyService during startup. Is there a programmatic way to do a dependency injection of MyDao into MyService, but not have spring manage the MyService? Basically I want to be able to do this from my code: MyService.getInstance().doSomething(); while having spring inject the MyDao for me.

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  • JAR files, don't they just bloat and slow Java down?

    - by Josamoto
    Okay, the question might seem dumb, but I'm asking it anyways. After struggling for hours to get a Spring + BlazeDS project up and running, I discovered that I was having problems with my project as a result of not including the right dependencies for Spring etc. There were .jars missing from my WEB-INF/lib folder, yes, silly me. After a while, I managed to get all the .jar files where they belong, and it comes at a whopping 12.5MB at that, and there's more than 30 of them! Which concerns me, but it probably and hopefully shouldn't be concerned. How does Java operate in terms of these JAR files, they do take up quite a bit of hard drive space, taking into account that it's compressed and compiled source code. So that can really quickly populate a lot of RAM and in an instant. My questions are: Does Java load an entire .jar file into memory when say for instance a class in that .jar is instantiated? What about stuff that's in the .jar that never gets used. Do .jars get cached somehow, for optimized application performance? When a single .jar is loaded, I understand that the thing sits in memory and is available across multiple HTTP requests (i.e. for the lifetime of the server instance running), unlike PHP where objects are created on the fly with each request, is this assumption correct? When using Spring, I'm thinking, I had to include all those fiddly .jars, wouldn't I just be better off just using native Java, with say at least and ORM solution like Hibernate? So far, Spring just took extra time configuring, extra hard drive space, extra memory, cpu consumption, so I'm concerned that the framework is going to cost too much application performance just to get for example, IoC implemented with my BlazeDS server. There still has to come ORM, a unit testing framework and bits and pieces here and there. It's just so easy to bloat up a project quickly and irresponsibly easily. Where do I draw the line?

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  • Injecting the application TransactionManager into a JPA EntityListener

    - by nodje
    I want to use the JPA EntityListener to support spring security ACLs. On @PostPersist events, I create a permission corresponding to the persisted entity. I need this operation to participate to the current Transaction. For this to happen I need to have a reference to the application TransactionManager in the EntityListener. The problem is, Spring can't manage the EntityListener as it is created automatically when EntityManagerFactory is instantiated. And in a classic Spring app, the EntityManagerFactory is itself created during the TransactioManager instantiation. <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory" /> </bean> So I have no way to inject the TransactionManager with the constructor, as it is not yet instantiated. Making the EntityManager a @Component create another instance of the EntityManager. Implementing InitiliazingBean and using afterPropertySet() doesn't work as it's not a Spring managed bean. Any idea would be helpful as I'm stuck and out of ideas.

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  • libvirt upgrade caused vms to not see drives (boot media not found)

    - by bias
    I upgraded to Ubuntu 12.04.1 and now libvirt (via open nebula) successfully runs vms but they aren't finding the 2 drives (specifically, the boot drive). One is "hd" the other is "cdrom". The machine boots but fails and displays something like "boot media not found hd" (this was in a vnc terminal and I didn't copy the output anywhere so that's not the verbatim message). I tried constructing a new disk using the new version of qemu (via vmbuilder) and this new machine has the same problem as the old machine. In case it matters (I can't see why it would) I'm using open nebula to manage the machines. There's nothing relevant in any of the logs: syslog, libvirtd, oned. Which is to say nothing interesting/anomalous is reported when the machine is brought up. Versions libvirt 0.9.8-2ubuntu17.4 qemu-kvm 1.0+noroms-0ubuntu14.3 The libvirt xml config portions (relavent) <os> <type arch='x86_64' machine='pc-1.0'>hvm</type> <boot dev='hd'/> </os> ... <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/var/lib/one//203/images/disk.0'/> <target dev='sda' bus='scsi'/> <alias name='scsi0-0-0'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/var/lib/one//203/images/disk.1'/> <target dev='sdc' bus='scsi'/> <readonly/> <alias name='scsi0-0-2'/> <address type='drive' controller='0' bus='0' unit='2'/> </disk> <controller type='scsi' index='0'> <alias name='scsi0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </controller> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </memballoon> ... </devices> The libvirt/qemu log contains 2012-11-25 22:19:24.328+0000: starting up LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc-1.0 -enable-kvm -m 256 -smp 1,sockets=1,cores=1,threads=1 -name one-204 -uuid 4be6c276-19e8-bdc2-e9c9-9ca5352f2be3 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/one-204.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device lsi,id=scsi0,bus=pci.0,addr=0x5 -drive file=/var/lib/one//204/images/disk.0,if=none,id=drive-scsi0-0-0,format=qcow2 -device scsi-disk,bus=scsi0.0,scsi-id=0,drive=drive-scsi0-0-0,id=scsi0-0-0,bootindex=1 -drive file=/var/lib/one//204/images/disk.1,if=none,media=cdrom,id=drive-scsi0-0-2,readonly=on,format=raw -device scsi-disk,bus=scsi0.0,scsi-id=2,drive=drive-scsi0-0-2,id=scsi0-0-2 -netdev tap,fd=18,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=02:00:c0:a8:00:68,bus=pci.0,addr=0x3 -netdev tap,fd=19,id=hostnet1 -device rtl8139,netdev=hostnet1,id=net1,mac=02:00:ad:f0:1b:94,bus=pci.0,addr=0x4 -usb -vnc 0.0.0.0:204 -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 kvm: -device rtl8139,netdev=hostnet0,id=net0,mac=02:00:c0:a8:00:68,bus=pci.0,addr=0x3: pci_add_option_rom: failed to find romfile "pxe-rtl8139.rom" kvm: -device rtl8139,netdev=hostnet1,id=net1,mac=02:00:ad:f0:1b:94,bus=pci.0,addr=0x4: pci_add_option_rom: failed to find romfile "pxe-rtl8139.rom"

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  • Problem in Apache CXF (Simple Frontend): 'Already connected'

    - by seanizer
    I am using apache CXF for the first time. I am trying to establish a connection based on the CXF simple front end (Configuration notes) technology. I can't really see what I've done wrong, but I am getting a weird error (see below). I have also posted this question to [email protected], but I haven't received a response yet. Perhaps someone here can help. The service bean that is wrapped here is a Spring / JPA service that does not know anything about the web, I want to use simple frontend to publish it as a web service without having to annotate it with Jax-ws etc. (This works in theory). Here's my configuration: Server: <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:simple="http://cxf.apache.org/simple" xmlns:soap="http://cxf.apache.org/bindings/soap" xmlns:context="http://www.springframework.org/schema/context" xmlns:cs="http://[www.mycompany.com]/coupon/service" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://cxf.apache.org/bindings/soap http://cxf.apache.org/schemas/configuration/soap.xsd http://cxf.apache.org/simple http://cxf.apache.org/schemas/simple.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd" default-autowire="byType" > <import resource="classpath:META-INF/cxf/cxf.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-http.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-http-binding.xml" /> <import resource="classpath:META-INF/cxf/cxf-servlet.xml" /> <import resource="classpath*:persistenceContext.xml" /> <!—my service implementation --> <!-- serviceClass points to an interface --> <simple:server id="server" serviceBean="couponService" serviceClass="[com.mycompany].MyServiceInterface" bindingId="http://apache.org/cxf/binding/http" address="/${wsdl.path}" serviceName="cs:couponService" endpointName="cs:couponServicePort" > <simple:dataBinding> <bean class="org.apache.cxf.aegis.databinding.AegisDatabinding" /> </simple:dataBinding> <simple:binding> <soap:soapBinding version="1.2" mtomEnabled="true" /> </simple:binding> </simple:server> <context:property-placeholder location="classpath:service.properties" /> </beans> Client: <beans xmlns="http://www.springframework.org/schema/beans" xmlns:simple="http://cxf.apache.org/simple" xmlns:soap="http://cxf.apache.org/bindings/soap" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:oxm=http://www.springframework.org/schema/oxm xmlns:cs="http://[www.mycompany.com]/coupon/service" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://cxf.apache.org/bindings/soap http://cxf.apache.org/schemas/configuration/soap.xsd http://cxf.apache.org/simple http://cxf.apache.org/schemas/simple.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-3.0.xsd" default-autowire="byType" > <import resource="classpath:META-INF/cxf/cxf.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-http.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-http-binding.xml" /> <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" /> <simple:client id="couponService" wsdlLocation="${wsdl.url}?wsdl" serviceName="cs:couponService" endpointName="cs:couponServicePort" transportId="http://schemas.xmlsoap.org/soap/http" address="${wsdl.url}" bindingId="http://apache.org/cxf/binding/http" serviceClass="[com.mycompany].MyServiceInterface"> <simple:dataBinding> <bean class="org.apache.cxf.aegis.databinding.AegisDatabinding" /> </simple:dataBinding> <simple:binding> <soap:soapBinding mtomEnabled="true" version="1.2" /> </simple:binding> </simple:client> <context:property-placeholder location="classpath:service.properties" /> On the client side, I inject the generated service into my web application (I am using wicket but that should be irrelevant) and when I call service methods on it I get an IllegalStateException from java.net.HttpURLConnection saying the connection is already open. Here’s the stack trace: java.lang.IllegalStateException: IllegalStateException invoking http://localhost:9999/services/coupon: Already connected at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.mapException(HTTPConduit.java:2058) at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:2048) at org.apache.cxf.transport.AbstractConduit.close(AbstractConduit.java:66) at org.apache.cxf.transport.http.HTTPConduit.close(HTTPConduit.java:639) at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:62) at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:243) at org.apache.cxf.binding.http.interceptor.DatabindingOutSetupInterceptor.handleMessage(DatabindingOutSetupInterceptor.java:91) at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:243) at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:487) at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:313) at org.apache.cxf.endpoint.ClientImpl.invoke(ClientImpl.java:265) at org.apache.cxf.frontend.ClientProxy.invokeSync(ClientProxy.java:73) at org.apache.cxf.frontend.ClientProxy.invoke(ClientProxy.java:68) at $Proxy30.createIndividualUserCouponsJob(Unknown Source) at [com.mycompany].coupons.web.app.dummycontent.DummyContentInitializer.addSomeIndividualCoupons(DummyContentInitializer.java:84) at [com.mycompany].coupons.web.app.dummycontent.DummyContentInitializer.addSomeCoupons(DummyContentInitializer.java:68) at [com.mycompany].coupons.web.app.dummycontent.DummyContentInitializer.init(DummyContentInitializer.java:50) at org.apache.wicket.Application.callInitializers(Application.java:843) at org.apache.wicket.Application.initializeComponents(Application.java:678) at org.apache.wicket.protocol.http.WicketFilter.init(WicketFilter.java:725) at org.apache.wicket.protocol.http.WicketServlet.init(WicketServlet.java:219) at javax.servlet.GenericServlet.init(GenericServlet.java:241) at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:433) at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:256) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40) at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:617) at org.mortbay.jetty.servlet.Context.startContext(Context.java:139) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1218) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:500) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:117) at org.mortbay.jetty.Server.doStart(Server.java:220) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40) at [com.mycompany].coupons.web.test.Start.main(Start.java:45) Caused by: java.lang.IllegalStateException: Already connected at java.net.HttpURLConnection.setFixedLengthStreamingMode(HttpURLConnection.java:103) at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.thresholdNotReached(HTTPConduit.java:1889) at org.apache.cxf.io.AbstractThresholdOutputStream.close(AbstractThresholdOutputStream.java:99) at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.close(HTTPConduit.java:1980) This happens the first time a service call is made, and the only URLConnection that is opened before that is that of the wsdl. I have searched the web for similar problems, but all I found was a bug using rest that has already been fixed. I am trying to use the simple frontend, as my service is not annotated with jax-ws annotations and I would like to keep it that way. Can someone help? Thanks in advance. Sean

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  • CSS file in a Spring WAR returns a 404

    - by Rachel G.
    I have a J2EE application that I am building with Spring and Maven. It has the usual project structure. Here is a bit of the hierarchy. MyApplication src main webapp WEB-INF layout header.jsp styles main.css I want to include that CSS file in my JSP. I have the following tag in place. <c:url var="styleSheetUrl" value="/styles/main.css" /> <link rel="stylesheet" href="${styleSheetUrl}"> When I deploy the application, the CSS page isn't being located. When I view the page source, the href is /MyApplication/styles/main.css. Looking inside the WAR, there is a /styles/main.css. However, I get a 404 when I try to access the CSS file directly in the browser. I discovered that the reason for the issue was the Dispatcher Servlet mapping. The mapping looks as follows. <servlet-mapping> <servlet-name>Spring MVC Dispatcher Servlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> I imagine the Dispatcher Servlet doesn't know how to handle the CSS request. What is the best way to handle this issue? I would rather not have to change all of my request mappings.

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  • Creating a Windows XP installation flash drive in linux

    - by Alex
    How can I create a bootable flash drive to install Windows XP from under Linux? I have Ubuntu installed on my PC and want to install Windows XP parallelly. I already have an NTFS hard drive, so what I need is to install Windows there and make it available through a boot manager. I also have a Windows installation .iso. So how to produce a ready-for-installation USB-stick from this?

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  • Fastest way to restore Windows 7's original MBR?

    - by Shiki
    I have removed GRUB's partition, and I wanted to restore the original Windows boot part. WinToFlash failed again to make my pendrive bootable, thus I'm in a bit of a trouble now. I looked all around, but I couldn't find any easy way to do this. What is the easiest and fastest way to restore the MBR? (I've got no Windows 7 DVD with me right now. And fetching the DVD is not really fast with a slower connection.)

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  • How do I redirect the kernel console output on Ubuntu 10.04

    - by lorin
    When I reboot my Ubuntu 10.04 nodes, I'd like to be able to see the kernel boot messages when connecting to the IPMI interfaces using Serial Over LAN mode (ttyS0). What do I need to do to be able to redirect these messages to ttyS0? Ideally, I'd like them to also still appear in the usual place (tty0, I think) for when I plug a monitor directly into the box.

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  • Android ADP1 can't start after first restart [closed]

    - by ufukgun
    My android phone does not boot up correctly. I installed clean firmware from HTC site dmesg shows a flood of request_suspend_state <6>[ 383.721618] request_suspend_state: wakeup (0->0) at 379960770263 (2009-07-18 12:59:03.568511963 UTC) <6>[ 389.309265] request_suspend_state: wakeup (0->0) at 385548416748 (2009-07-18 12:59:09.156158448 UTC) <6>[ 393.880401] request_suspend_state: wakeup (0->0) at 390119553222 (2009-07-18 12:59:13.727294922 UTC) <6>[ 398.465209] request_suspend_state: wakeup (0->0) at 394704392089 (2009-07-18 12:59:18.312103272 UTC) ... ... What's wrong?

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  • Multiple nt52 entries in bootmgr

    - by SLaks
    I have a machine with Windows XP, Server 2003 R2, and Server 2008 R2. Right now, bootmgr has one entry for Server 2008 R2 and one entry for ntldr, which then leads to the ntldr boot.ini menu. Is it possible to add two different nt52 entries on two partitions so that I can access all three OSes from the bootmgr menu? Right now, Server 2008 and XP are in logical drives on an extended partition, but (I assume) I can image them onto basic partitions if necessary.

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  • primary master drive fail

    - by Kelly
    I purchased a new hard drive for my desktop and when I try to boot up the computer with a Windows disc in the drive, it will go through a bunch of screens and ask me which partition I would like to install windows into, but after it goes through the formatting step and reboots, I get a message saying Primary Master Drive Fails. How do I fix this?

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  • Linux distro for notebooks

    - by Nrew
    What might be the most compatible linux distro for notebooks. Mine is an compaq b1200. With windows 7 installed and I want to dual boot it with a linux distro. I already tried ubuntu 10.04 notebook edition but no luck because the graphics is so slow. When you try to point on an option it takes about 30 seconds for it to respond. Please recommend a distro that is most likely compatible with most notebooks.

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  • Good OS (gOS) instalation from USB key

    - by Peter Stegnar
    I would like to install Good OS from USB key. I have found a nice instructions http://www.pendrivelinux.com/usb-gos-install-from-windows/. Everything is OK while USB key is being prepared. But when I am trying to boot from that USB key I get the following error: "no bootable partition in table" It seems like USB key is not prepared properly ... How can I install gOS from USB key?

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  • Adding Windows 7 to GRUB

    - by Aakarshit
    I had Windows 7 and Vista installed on my laptop. When I installed Ubuntu 9.04 the GRUB entry for Windows 7 was erased and I can only see choices for Vista and Ubuntu in the boot menu. How do I overcome this problem?

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  • Windows Vista Corrupt Registry

    - by Peter
    Hey, I have a laptop with Windows Vista Basic. It won't boot. I have tried an automatic repair with the installation disc but the error cannot be repaired automatically. According to the test results the registry is corrupt. I have found this guide on how to recover from a corrupt registry with Windows XP here. Is this guide also applicable to Vista or is there an alternative method I can try (short of reinstalling Vista)? Cheers, Pete

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  • Windows Datacenter 2008 recovery ISO

    - by Will
    Hello, I am using virtualBox with windows datacenter to play around with some web development. The last time I had to shut down the computer, it installed an update and shut down normally. When I rebooted, it started doing a checkdisk and processed a bunch of files (from hard poweroffs before mabey). Now when I start, I get a bluescreen of death every time it loads (Safe mode,etc) I have googled around for a boot / recovery disk, but can't seem to find one for datacenter. Cheers -Will

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  • windows xp not booting up! help!

    - by Krystle
    i just used roxo to system restore my laptop from its first saved state. now it won't boot up. it just says. "bootmgr compressed" what do i do with this. FYI my laptop is an HP Mini which do not have a cd rom. so Booting up windows XP from cd to fix it won't help me.. Please Help me solve this problem?

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  • when /etc/modules is used?

    - by Dyno Fu
    "# /etc/modules: kernel modules to load at boot time." my question is when and where the module loading job done? my first guess is some init scripts in /etc/init.d/ but grep got none. then i think it might be the init ramdisk, but after decompress it, i found conf/modules which is different with /etc/modules. any idea? thanx.

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  • Profile windows start-up time

    - by Konrads
    Hi, As it happens, windows workstations get slow over time. Notably, users complain about slow start-up times. What is the scientific approach to identifying what impact what service/operation on start-up has on boot time or resource usage?

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