Question

我有以下bean声明xml。

  <bean id="taskExecutor" class="com.XXX.xxx.management.common.executor.TaskExecutorImpl"
        destroy-method="shutdown">
        <constructor-arg name="threadPoolSize" value="5"/>
        <constructor-arg name="executionQueueCapacity" value="1000"/>
        <constructor-arg name="typeLimit" value="5"/>
    </bean>

和以下是TaskExecutorImpl的代码。

    import java.util.AbstractQueue;
    import java.util.ArrayList;
    import java.util.Collection;
    import java.util.Comparator;
    import java.util.Iterator;
    import java.util.List;
    import java.util.TreeSet;
    import java.util.concurrent.BlockingQueue;
    import java.util.concurrent.CancellationException;
    import java.util.concurrent.ConcurrentHashMap;
    import java.util.concurrent.ExecutionException;
    import java.util.concurrent.ExecutorService;
    import java.util.concurrent.FutureTask;
    import java.util.concurrent.RejectedExecutionException;
    import java.util.concurrent.ThreadPoolExecutor;
    import java.util.concurrent.TimeUnit;
    import java.util.concurrent.TimeoutException;
    import java.util.concurrent.atomic.AtomicInteger;
    import java.util.concurrent.locks.Condition;
    import java.util.concurrent.locks.ReentrantLock;

    import javax.annotation.PostConstruct;

    public class TaskExecutorImpl implements TaskExecutor {
        private final int threadPoolSize;
        private final int executionQueueCapacity;
        private final int typeLimit;

        private BlockingPriorityTaskQueue executionQueue;
        private ExecutorService threadPool;

        private ConcurrentHashMap<String, AtomicInteger> executionByTypeMap = new ConcurrentHashMap<>();

        /**
         * Main lock guarding all access
         */
        final ReentrantLock mainLock;
        /**
         * Condition for waiting takes
         */
        private final Condition notEmpty;
        /**
         * Condition for waiting puts
         */
        private final Condition notFull;

        public TaskExecutorImpl(int threadPoolSize, int executionQueueCapacity, int typeLimit) {
            this.threadPoolSize = threadPoolSize;
            this.executionQueueCapacity = executionQueueCapacity;
            this.typeLimit = typeLimit;

            mainLock = new ReentrantLock();
            notEmpty = mainLock.newCondition();
            notFull = mainLock.newCondition();
        }

        @PostConstruct
        @SuppressWarnings("unchecked")
        public void initialize() {
            executionQueue = new BlockingPriorityTaskQueue(executionQueueCapacity);
            threadPool = new ThreadPoolExecutor(threadPoolSize, threadPoolSize, 0L, TimeUnit.MILLISECONDS,
                    (BlockingQueue) executionQueue);

            // create core threads, required for type control
            for (int i = 0; i < threadPoolSize; i++) {
                threadPool.execute(new Runnable() {
                    @Override
                    public void run() {
                        // nothing here
                    }
                });
            }
        } 

and other Methdods implementation so on

当我开始上下文时，我得到以下错误

2017-06-01 06:50:22.625 GMT ERROR localhost-startStop-1 ContextLoader：331 - 上下文初始化失败 org.springframework.beans.factory.BeanCreationException：使用名称＆＃39; org.springframework.context.annotation.internalAsyncAnnotationProcessor＆＃39;创建bean时出错：bean的初始化失败;嵌套异常是org.springframework.beans.ConversionNotSupportedException：无法转换类型＆＃39; com.xxx.xxx.management.common.executor.TaskExecutorImpl＆＃39;的属性值。要求的类型＆＃39; java.util.concurrent.Executor＆＃39;对于财产执行者＆＃39 ;;嵌套异常是java.lang.IllegalStateException：无法将[com.xxx.xxx.management.common.executor.TaskExecutorImpl]类型的值转换为属性＆＃39; executor＆＃39所需的类型[java.util.concurrent.Executor] ;：找不到匹配的编辑器或转换策略在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:529）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:458） at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:293）在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:223）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:290）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:195）在org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors（AbstractApplicationContext.java:743）在org.springvmframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:464）在org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext（ContextLoader.java:410）在org.springframework.web.context.ContextLoader.initWebApplicationContext（ContextLoader.java:306）在org.springframework.web.context.ContextLoaderListener.contextInitialized（ContextLoaderListener.java:112） at org.apache.catalina.core.StandardContext.listenerStart（StandardContext.java:4853） at org.apache.catalina.core.StandardContext.startInternal（StandardContext.java:5314）在org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java:145）在org.apache.catalina.core.ContainerBase.addChildInternal（ContainerBase.java:753）在org.apache.catalina.core.ContainerBase.addChild（ContainerBase.java:729）在org.apache.catalina.core.StandardHost.addChild（StandardHost.java:717）在org.apache.catalina.startup.HostConfig.deployDirectory（HostConfig.java:1092）在org.apache.catalina.startup.HostConfig $ DeployDirectory.run（HostConfig.java:1834） at java.util.concurrent.Executors $ RunnableAdapter.call（Executors.java:511） at java.util.concurrent.FutureTask.run（FutureTask.java:266）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1142） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:617）在java.lang.Thread.run（Thread.java:748）引起：org.springframework.beans.ConversionNotSupportedException：无法转换类型＆＃39; com.messages.nsx.management.common.executor.TaskExecutorImpl＆＃39;的属性值。要求的类型＆＃39; java.util.concurrent.Executor＆＃39;对于财产执行者＆＃39 ;;嵌套异常是java.lang.IllegalStateException：无法将[com.xxx.xxx.management.common.executor.TaskExecutorImpl]类型的值转换为属性＆＃39; executor＆＃39所需的类型[java.util.concurrent.Executor] ;：找不到匹配的编辑器或转换策略在org.springframework.beans.BeanWrapperImpl.convertIfNecessary（BeanWrapperImpl.java:464）在org.springframework.beans.BeanWrapperImpl.convertForProperty（BeanWrapperImpl.java:495）在org.springframework.beans.BeanWrapperImpl.convertForProperty（BeanWrapperImpl.java:489）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty（AbstractAutowireCapableBeanFactory.java:1465）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues（AbstractAutowireCapableBeanFactory.java:1424）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1160）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:519） ......还有23个引起：java.lang.IllegalStateException：无法将[com.xxx.xxx.management.common.executor.TaskExecutorImpl]类型的值转换为属性＆＃39; executor＆＃39所需的类型[java.util.concurrent.Executor] ;：找不到匹配的编辑器或转换策略在org.springframework.beans.TypeConverterDelegate.convertIfNecessary（TypeConverterDelegate.java:267）在org.springframework.beans.BeanWrapperImpl.convertIfNecessary（BeanWrapperImpl.java:449） ... 29更多

Answer 1

根据TaskExecutorImpl未实现java.util.concurrent.Executor的堆栈跟踪。我们真的在TaskExecutorImpl课程中看不到。

它实现了一些TaskExecutor，但我们无法说出哪一个，因为它没有导入。这只能说我们这个接口在同一个包中。

因此，请确保实现适当的接口以满足依赖注入要求。

Spring：无法将TaskExecutorImpl类型的值转换为java.util.concurrent.Executor

1 个答案: