草庐IT

java - Spring boot 应用程序失败方法 org.postgresql.jdbc4.Jdbc4Connection.createClob() 尚未实现

coder 2024-03-09 原文

我正在使用 spring boot 命令行运行器应用程序,它在 PostGIS 方言中挂起,下面的堆栈跟踪包含正在发生的事情。无法理解出了什么问题,我有 hibernate 空间查询。

2018-04-06 12:11:08.554  INFO 31495 --- [           main] replayer.Main                            : No active profile set, falling back to default profiles: default
2018-04-06 12:11:08.780  INFO 31495 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@39d9314d: startup date [Fri Apr 06 12:11:08 NZST 2018]; root of context hierarchy
2018-04-06 12:11:10.811  INFO 31495 --- [           main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2018-04-06 12:11:11.149  INFO 31495 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$a0866479] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-04-06 12:11:12.038  INFO 31495 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2018-04-06 12:11:12.113  INFO 31495 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2018-04-06 12:11:12.113  INFO 31495 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.28
2018-04-06 12:11:12.146  INFO 31495 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]
2018-04-06 12:11:12.385  INFO 31495 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2018-04-06 12:11:12.386  INFO 31495 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 3615 ms 
2018-04-06 12:11:12.704  INFO 31495 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]
2018-04-06 12:11:12.710  INFO 31495 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-04-06 12:11:12.711  INFO 31495 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-04-06 12:11:12.711  INFO 31495 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-04-06 12:11:12.711  INFO 31495 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2018-04-06 12:11:13.264  INFO 31495 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2018-04-06 12:11:14.376  INFO 31495 --- [           main] com.zaxxer.hikari.pool.PoolBase          : HikariPool-1 - Driver does not support get/set network timeout for connections. (Method org.postgresql.jdbc4.Jdbc4Connection.getNetworkTimeout() is not yet implemented.)
2018-04-06 12:11:14.834  INFO 31495 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2018-04-06 12:11:15.073  INFO 31495 --- [           main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2018-04-06 12:11:15.111  INFO 31495 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2018-04-06 12:11:15.306  INFO 31495 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {5.0.0.Final}
2018-04-06 12:11:15.310  INFO 31495 --- [           main] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
2018-04-06 12:11:15.313  INFO 31495 --- [           main] org.hibernate.cfg.Environment            : HHH000021: Bytecode provider name : javassist
2018-04-06 12:11:15.332  INFO 31495 --- [           main] o.h.spatial.integration.SpatialService   : HHH80000001: hibernate-spatial integration enabled : true
2018-04-06 12:11:15.418  INFO 31495 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.0.0.Final}
2018-04-06 12:11:15.891  INFO 31495 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.spatial.dialect.postgis.PostgisDialect
2018-04-06 13:10:34.209  INFO 2217 --- [           main] o.h.e.j.e.i.LobCreatorBuilderImpl        : HHH000424: Disabling contextual LOB creation as createClob() method threw error : 
java.lang.reflect.InvocationTargetException

java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_161]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_161]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_161]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_161]
at org.hibernate.engine.jdbc.env.internal.LobCreatorBuilderImpl.useContextualLobCreation(LobCreatorBuilderImpl.java:113) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.engine.jdbc.env.internal.LobCreatorBuilderImpl.makeLobCreatorBuilder(LobCreatorBuilderImpl.java:54) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentImpl.<init>(JdbcEnvironmentImpl.java:247) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:114) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:88) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:234) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:208) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:51) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:94) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:217) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.handleTypes(MetadataBuildingProcess.java:352) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:111) [hibernate-core-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:770) [hibernate-entitymanager-5.0.0.Final.jar:5.0.0.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:797) [hibernate-entitymanager-5.0.0.Final.jar:5.0.0.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:57) [spring-orm-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) [spring-orm-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:388) [spring-orm-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:377) [spring-orm-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) [spring-orm-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1769) [spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1706) [spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:583) [spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) [spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) [spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) [spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) [spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1085) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:858) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:388) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) ~[spring-boot-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at replayer.Main.main(Main.java:29) ~[classes/:na]
Caused by: java.sql.SQLFeatureNotSupportedException: Method org.postgresql.jdbc4.Jdbc4Connection.createClob() is not yet implemented.
at org.postgresql.Driver.notImplemented(Driver.java:734) ~[postgresql-9.3-1104-jdbc41.jar:na]
at org.postgresql.jdbc4.AbstractJdbc4Connection.createClob(AbstractJdbc4Connection.java:58) ~[postgresql-9.3-1104-jdbc41.jar:na]
at org.postgresql.jdbc4.Jdbc4Connection.createClob(Jdbc4Connection.java:21) ~[postgresql-9.3-1104-jdbc41.jar:na]
... 42 common frames omitted

2018-04-06 13:10:34.211  INFO 2217 --- [           main] org.hibernate.type.BasicTypeRegistry     : HHH000270: Type registration [java.util.UUID] overrides previous : org.hibernate.type.UUIDBinaryType@364b1061
2018-04-06 13:10:34.430  INFO 2217 --- [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2018-04-06 13:10:34.462  WARN 2217 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'main': Unsatisfied dependency expressed through field 'eboxEventRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'repository.EboxEventRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2018-04-06 13:10:34.463  INFO 2217 --- [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2018-04-06 13:10:34.463  INFO 2217 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2018-04-06 13:10:34.486  INFO 2217 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
2018-04-06 13:10:34.488  INFO 2217 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2018-04-06 13:10:34.507  INFO 2217 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-04-06 13:10:34.641 ERROR 2217 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

**************************
APPLICATION FAILED TO START
***************************

Description:

Field eboxEventRepository in replayer.Main required a bean of type 'repository.EboxEventRepository' that could not be found.


Action:

Consider defining a bean of type 'repository.EboxEventRepository' in your configuration.

我的主类如下所示,我希望它成为一个命令行运行程序,因此实现了 CommandLineRunner。

应用程序应该只从特定表中读取数据并将其转储到 json 内容和磁盘上。

package replayer;


import com.fasterxml.jackson.databind.ObjectMapper;
import my.model.Event;
import my.model.EventMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.Banner;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import repository.EventRepository;

import java.io.PrintWriter;
import java.util.Arrays;
import java.util.List;
import java.util.UUID;

@SpringBootApplication
public class Main implements CommandLineRunner {

@Autowired
EventRepository eboxEventRepository;

public static void main(String[] args) {

    SpringApplication app = new SpringApplication(Main.class);
    app.setBannerMode(Banner.Mode.OFF);
    app.run(args);

}

@Override
public void run(String... args) throws Exception {
    List<EboxEvent> eboxEvents = eboxEventRepository.findEboxEventBetweenEventTimestamps(null, null);

    final ObjectMapper objectMapper = new ObjectMapper();
    PrintWriter out = new PrintWriter("/tmp/events.tmp");

    for (EboxEvent event : eboxEvents) {
        EventMessage message = new EventMessage.Builder(EventMessage.Type.DATA_CHANGED,
                        EventMessage.Operation.CREATE,
                        my.model.Event.class.getName()).eventId(UUID.randomUUID().toString()).dataAfter(Arrays.asList(event))
                        .build();
        String json = objectMapper.writeValueAsString(message);
        out.println(json);
    }
}

我的pom依赖是这样的

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
        <version>3.7</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>5.0.0.Final</version>
        <exclusions>
            <exclusion>
                <groupId>org.hibernate.javax.persistence</groupId>
                <artifactId>hibernate-jpa-2.0-api</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.hibernate.javax.persistence</groupId>
                <artifactId>hibernate-jpa-2.1-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-spatial</artifactId>
        <version>5.0.0.Final</version>
        <exclusions>
            <exclusion>
                <groupId>postgresql</groupId>
                <artifactId>postgresql</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>5.0.0.Final</version>
        <exclusions>
            <exclusion>
                <groupId>org.hibernate.javax.persistence</groupId>
                <artifactId>hibernate-jpa-2.0-api</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.hibernate.javax.persistence</groupId>
                <artifactId>hibernate-jpa-2.1-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <version>9.3-1104-jdbc41</version>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.7.21</version>
    </dependency>

</dependencies>

最佳答案

createClob 失败可能是可能的原因。 github上的类似问题 https://github.com/pgjdbc/pgjdbc/issues/1102

引用的解决方案是

http://vkuzel.blogspot.in/2016/03/spring-boot-jpa-hibernate-atomikos.html

这是禁用 JDBC 元数据的使用并设置正确的方言。

spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults = false
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQL9Dialect

或在 YAML 中:

spring:
  jpa:
    properties:
      hibernate:
        temp:
          use_jdbc_metadata_defaults: false
    database-platform: org.hibernate.dialect.PostgreSQL9Dialect

关于java - Spring boot 应用程序失败方法 org.postgresql.jdbc4.Jdbc4Connection.createClob() 尚未实现,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49683434/

有关java - Spring boot 应用程序失败方法 org.postgresql.jdbc4.Jdbc4Connection.createClob() 尚未实现的更多相关文章

  1. ruby - 如何使用 Nokogiri 的 xpath 和 at_xpath 方法 - 2

    我正在学习如何使用Nokogiri,根据这段代码我遇到了一些问题:require'rubygems'require'mechanize'post_agent=WWW::Mechanize.newpost_page=post_agent.get('http://www.vbulletin.org/forum/showthread.php?t=230708')puts"\nabsolutepathwithtbodygivesnil"putspost_page.parser.xpath('/html/body/div/div/div/div/div/table/tbody/tr/td/div

  2. ruby - 如何从 ruby​​ 中的字符串运行任意对象方法? - 2

    总的来说,我对ruby​​还比较陌生,我正在为我正在创建的对象编写一些rspec测试用例。许多测试用例都非常基础,我只是想确保正确填充和返回值。我想知道是否有办法使用循环结构来执行此操作。不必为我要测试的每个方法都设置一个assertEquals。例如:describeitem,"TestingtheItem"doit"willhaveanullvaluetostart"doitem=Item.new#HereIcoulddotheitem.name.shouldbe_nil#thenIcoulddoitem.category.shouldbe_nilendend但我想要一些方法来使用

  3. ruby - 为什么我可以在 Ruby 中使用 Object#send 访问私有(private)/ protected 方法? - 2

    类classAprivatedeffooputs:fooendpublicdefbarputs:barendprivatedefzimputs:zimendprotecteddefdibputs:dibendendA的实例a=A.new测试a.foorescueputs:faila.barrescueputs:faila.zimrescueputs:faila.dibrescueputs:faila.gazrescueputs:fail测试输出failbarfailfailfail.发送测试[:foo,:bar,:zim,:dib,:gaz].each{|m|a.send(m)resc

  4. ruby - Facter::Util::Uptime:Module 的未定义方法 get_uptime (NoMethodError) - 2

    我正在尝试设置一个puppet节点,但ruby​​gems似乎不正常。如果我通过它自己的二进制文件(/usr/lib/ruby/gems/1.8/gems/facter-1.5.8/bin/facter)在cli上运行facter,它工作正常,但如果我通过由ruby​​gems(/usr/bin/facter)安装的二进制文件,它抛出:/usr/lib/ruby/1.8/facter/uptime.rb:11:undefinedmethod`get_uptime'forFacter::Util::Uptime:Module(NoMethodError)from/usr/lib/ruby

  5. ruby - 在 Ruby 程序执行时阻止 Windows 7 PC 进入休眠状态 - 2

    我需要在客户计算机上运行Ruby应用程序。通常需要几天才能完成(复制大备份文件)。问题是如果启用sleep,它会中断应用程序。否则,计算机将持续运行数周,直到我下次访问为止。有什么方法可以防止执行期间休眠并让Windows在执行后休眠吗?欢迎任何疯狂的想法;-) 最佳答案 Here建议使用SetThreadExecutionStateWinAPI函数,使应用程序能够通知系统它正在使用中,从而防止系统在应用程序运行时进入休眠状态或关闭显示。像这样的东西:require'Win32API'ES_AWAYMODE_REQUIRED=0x0

  6. ruby - 将差异补丁应用于字符串/文件 - 2

    对于具有离线功能的智能手机应用程序,我正在为Xml文件创建单向文本同步。我希望我的服务器将增量/差异(例如GNU差异补丁)发送到目标设备。这是计划:Time=0Server:hasversion_1ofXmlfile(~800kiB)Client:hasversion_1ofXmlfile(~800kiB)Time=1Server:hasversion_1andversion_2ofXmlfile(each~800kiB)computesdeltaoftheseversions(=patch)(~10kiB)sendspatchtoClient(~10kiBtransferred)Cl

  7. Ruby 方法() 方法 - 2

    我想了解Ruby方法methods()是如何工作的。我尝试使用“ruby方法”在Google上搜索,但这不是我需要的。我也看过ruby​​-doc.org,但我没有找到这种方法。你能详细解释一下它是如何工作的或者给我一个链接吗?更新我用methods()方法做了实验,得到了这样的结果:'labrat'代码classFirstdeffirst_instance_mymethodenddefself.first_class_mymethodendendclassSecond使用类#returnsavailablemethodslistforclassandancestorsputsSeco

  8. ruby - 如何指定 Rack 处理程序 - 2

    Rackup通过Rack的默认处理程序成功运行任何Rack应用程序。例如:classRackAppdefcall(environment)['200',{'Content-Type'=>'text/html'},["Helloworld"]]endendrunRackApp.new但是当最后一行更改为使用Rack的内置CGI处理程序时,rackup给出“NoMethodErrorat/undefinedmethod`call'fornil:NilClass”:Rack::Handler::CGI.runRackApp.newRack的其他内置处理程序也提出了同样的反对意见。例如Rack

  9. ruby - 在 Ruby 中编写命令行实用程序 - 2

    我想用ruby​​编写一个小的命令行实用程序并将其作为gem分发。我知道安装后,Guard、Sass和Thor等某些gem可以从命令行自行运行。为了让gem像二进制文件一样可用,我需要在我的gemspec中指定什么。 最佳答案 Gem::Specification.newdo|s|...s.executable='name_of_executable'...endhttp://docs.rubygems.org/read/chapter/20 关于ruby-在Ruby中编写命令行实用程序

  10. ruby-on-rails - Rails 3.2.1 中 ActionMailer 中的未定义方法 'default_content_type=' - 2

    我在我的项目中添加了一个系统来重置用户密码并通过电子邮件将密码发送给他,以防他忘记密码。昨天它运行良好(当我实现它时)。当我今天尝试启动服务器时,出现以下错误。=>BootingWEBrick=>Rails3.2.1applicationstartingindevelopmentonhttp://0.0.0.0:3000=>Callwith-dtodetach=>Ctrl-CtoshutdownserverExiting/Users/vinayshenoy/.rvm/gems/ruby-1.9.3-p0/gems/actionmailer-3.2.1/lib/action_mailer

随机推荐