小编Abh*_*rar的帖子

嗨,我正在尝试使用HikariCP与Spring连接池.我正在使用jdbcTempLate和JdbcdaoSupport.
这是我的数据源的spring配置文件:

<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource">
    <property name="dataSourceClassName" value="oracle.jdbc.driver.OracleDriver"/>
    <property name="dataSource.url" value="jdbc:oracle:thin:@localhost:1521:XE"/>
    <property name="dataSource.user" value="username"/>
    <property name="dataSource.password" value="password"/>
</bean>

但不幸的是,生成以下错误消息:

Cannot resolve reference to bean 'dataSource' while setting bean property 'dataSource'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.zaxxer.hikari.HikariDataSource]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.zaxxer.hikari.HikariDataSource.<init>()

谁能告诉我如何解决这个问题？

我正在尝试在Spring @Configuration类[Database is oracle]中配置HikariCP数据源.但它不起作用.

我在互联网上搜索,发现需要使用构造函数配置HikariCP数据源.我已经尝试了[它在github网页中提到的方式],但它仍然无效.请帮我解决这个问题.

private HikariDataSource dataSource() {
    final HikariDataSource ds = new HikariDataSource();
    ds.setMaximumPoolSize(100); 
    ds.setDataSourceClassName("oracle.jdbc.driver.OracleDriver"); 
    ds.addDataSourceProperty("url", "jdbc:oracle:thin:@localhost:1521:XE"); 
    ds.addDataSourceProperty("user", "username");
    ds.addDataSourceProperty("password", "password");
    ds.addDataSourceProperty("cachePrepStmts", true); 
    ds.addDataSourceProperty("prepStmtCacheSize", 250); 
    ds.addDataSourceProperty("prepStmtCacheSqlLimit", 2048); 
    ds.addDataSourceProperty("useServerPrepStmts", true);
    return ds;
} 

我正在使用Play 2.5构建一个简单的应用程序.为了获得更好的性能,我使用了Akka chunked响应和Java 8 CompletionStage策略.下面是生成分块响应的代码(不使用ComperableFuture时工作正常):

@Singleton
public class AbstractSource {

    public Source<ByteString, ?> getChunked(String html) {

        return Source.<ByteString>actorRef(256, OverflowStrategy.dropNew())
                .mapMaterializedValue(sourceActor -> {
                    sourceActor.tell(ByteString.fromString(html), null);
                    sourceActor.tell(new Status.Success(NotUsed.getInstance()), null);
                    return null;
                });

    }

}

这是我的控制器:

@Singleton
@AddCSRFToken
public class Application extends Controller {

    @Inject
    private AbstractSource abstractSource;

    public CompletionStage<Result> index() {


        CompletionStage<Source<ByteString, ?>> source = CompletableFuture.supplyAsync(() -> 
                                                  abstractSource.getChunked(index.render(CSRF.getToken(request()).map(t -> 
                                                    t.value()).orElse("no token")).body()
                                                   )
                                                );

        return source.thenApply( chunks -> ok().chunked(chunks));

    }

}

现在,当我运行应用程序时,它会抛出以下异常:

play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[CompletionException: java.lang.RuntimeException: There is no HTTP Context available from …

我正在尝试使用PLay 2和Akka在webapp中实现块响应.但是,不是按块加载响应,而是所有响应都是一次响应.下面是我在控制器中创建块的代码:

/**
 * 
 */    
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;

import com.google.inject.Inject;
import com.google.inject.Singleton;
import akka.stream.javadsl.Source;
import akka.util.ByteString;
import org.pmw.tinylog.Logger;
import play.cache.CacheApi;
import play.cache.Cached;
import play.filters.csrf.AddCSRFToken;
import play.filters.csrf.CSRF;
import play.libs.Json;
import play.libs.concurrent.HttpExecutionContext;
import play.mvc.Controller;
import play.mvc.Http;
import play.mvc.Http.Cookie;
import play.mvc.Result;

import akka.NotUsed;
import akka.actor.Status;
import akka.stream.OverflowStrategy;
import akka.stream.javadsl.Source;
import akka.util.ByteString;

/**
 * @author Abhinabyte
 *
 */
@Singleton
@AddCSRFToken
public class GetHandler extends Controller {

    @Inject
    private CacheApi cache;

    @Inject
    private HttpExecutionContext httpExecutionContext;

    public CompletionStage<Result> index() {

return CompletableFuture.supplyAsync( () ->
            Source.<ByteString>actorRef(256, …