我试图将接口作为类中的属性(继承另一个类)中的属性传递,我遇到了一个错误。我在一堂课中尝试了同一件事,该课程没有继承任何东西,而且效果很好。我不知道我在这里是否缺少任何东西。任何帮助都将受到赞赏。谢谢:)
类:
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Hashtable;
import java.util.StringTokenizer;
import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.impl.ScheduledPollConsumer;
import com.walmart.utils.storeConfig.api.IStoreConfigService;
public class WalPipeConsumer extends ScheduledPollConsumer
{
final static private String CLASS_NAME = WalPipeConsumer.class.getName();
final static private Logger logger = Logger.getLogger(CLASS_NAME);
protected Hashtable pipeBuffers;
private Vector msgs = new Vector();
private int arrrayLength = 0, headerLength = 0;
private final Endpoint endpoint;
private final String pipe;
private IStoreConfigService storeConfigService;
public WalPipeConsumer(Endpoint endpoint, Processor processor, String pipe)
throws Exception
{
super(endpoint, processor);
logger.finest("inside the wal pipe consumer constructor");
this.pipe = pipe;
this.endpoint = endpoint;
this.countryCode = countryCode;
logger.finest("before starting the thread");
new Thread(new WalPipeInputRunner(), "WalCamel Pipe Consumer[" + pipe
+ "]").start();
logger.finest("after starting the thread");
}
// There are some more functions
/**
* @param storeConfigServicethe storeConfigService to set
*/
public void setStoreConfigService(IStoreConfigService storeConfigService) {
this.storeConfigService = storeConfigService;
}
blueprint.xml:
<reference id="storeConfigService"
interface="com.walmart.utils.storeConfig.api.IStoreConfigService" />
<bean id="storeConfigAdapter" class="com.tgcs.walpipe.endpoint.StoreConfigAdapter" init-method="init">
<property name="storeConfigService" ref="storeConfigService" />
</bean>
<bean id="WalPipeConsumer" class="com.tgcs.walpipe.endpoint.WalPipeConsumer">
<property name="storeConfigService" ref="storeConfigService" />
</bean>
错误:
[2017.09.15-10:34:00.788] [SEVERE]
[org.apache.aries.blueprint.container.BlueprintContainerImpl]
[org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun] - Unable
to start blueprint container for bundle com.tgcs.walpipe.endpoint
org.osgi.service.blueprint.container.ComponentDefinitionException: Unable to
find a matching constructor on class
com.tgcs.walpipe.endpoint.WalPipeConsumer for arguments [] when
instanciating bean WalPipeConsumer
蓝图试图创建一个walpipececumer的实例。您正在使用属性来设置StoreconFigService。因此,BluePrint将首先调用空构造函数以实例化类,然后致电设置器设置StoreconFigService。
由于类没有空约束,因此会失败。
要解决这个问题,您要么需要一个空构造函数,要么使用元素来设置现有构造函数的所有参数。