javax.jcr.lock.LockException：前提条件失败 [英] javax.jcr.lock.LockException:Precondition Failed
问题描述
我在连接到AEM 6.0中的JCR存储库时遇到一些问题。当我到达在笔迹上创建会话的地步时，我得到了
javax.jcr.lock.LockException：Precondition Failed。 / p>
stacktrace：javax.jcr.lock.LockException：前提条件在
org.apache.jackrabbit.spi2dav.ExceptionConverter.generate（ExceptionConverter.java:109）中失败b $ b在
org.apache.jackrabbit.spi2dav.ExceptionConverter.generate（ExceptionConverter.java:51）
在
org.apache.jackrabbit.spi2dav.ExceptionConverter.generate（ExceptionConverter.java ：45）在
处的
org.apache.jackrabbit.spi2dav.RepositoryServiceImpl.obtain（RepositoryServiceImpl.java:809）在
处的
org.apache.jackrabbit.spi2dav.RepositoryServiceImpl.obtain （RepositoryServiceImpl.java:753）
在
org.apache.jackrabbit.spi2davex.RepositoryServiceImpl.obtain（RepositoryServiceImpl.java:307）
在
org.apache.jackrabbit.jcr2spi .RepositoryImpl.login（RepositoryImpl.java:151）
在
org.apache.jackrabbit.commons.AbstractRepository.login（AbstractRepository.java:123）
at org.test.CallSlingServlet.main（CallSlingServlet.java:63）导致
由：org.apache.jackrabbit引起。 webdav.DavException：前提条件在
org.apache.jackrabbit.webdav.client.methods.DavMethodBase.getResponseException（DavMethodBase.java:162）在
org.apache.jackrabbit.webdav处失败。 client.methods.DavMethodBase.getResponseBodyAsMultiStatus（DavMethodBase.java:91）
at
org.apache.jackrabbit.spi2dav.RepositoryServiceImpl.obtain（RepositoryServiceImpl.java:781）
... 5更多错误：javax.jcr.lock.LockException：前提条件失败
我使用的示例代码。
包org.test;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import javax.jcr.Node;
import javax.jcr.Repository;
import javax.jcr.SimpleCredentials;
进口org.apache.jackrabbit.commons.JcrUtils;
import com.google.api.client.repackaged.org.apache.commons.codec.binary.Base64;
import com.google.enterprise.apis.client.GsaClient;
import com.google.enterprise.apis.client.GsaEntry;
import com.google.enterprise.apis.client.GsaFeed;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
公共类CallSlingServlet {
public static void main（String [] args）抛出异常{
// TODO Auto-生成的方法存根
尝试{
存储库= JcrUtils.getRepository（ http：// localhost：4502 / crx / server）;
javax.jcr.Session会话= repository.login（new SimpleCredentials（ admin， admin .toCharArray（）））;
节点root1 = session.getRootNode（）;
Node node =（（Node）root1）.getNode（ / content / act / GSAEvents）;
System.out.println（node.getPath（））;
System.out.println（node.getProperty（ message）。getString（））;
}
catch（例外ex）{
//一个真正的程序需要处理该异常
System.out.println（ error： + ex）;
}
}}
在JCR存储库中，内容被组织到一个或多个工作空间中，每个工作空间都包含节点和属性的分层结构。因此，要创建一个jcr会话&访问节点和您必须通过凭据传递工作空间的属性，默认AEM工作空间为 crx.default
尝试以下代码
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import javax.jcr.Node;
import javax.jcr.Repository;
import javax.jcr.SimpleCredentials;
import org.apache.jackrabbit.commons.JcrUtils;
公共类CallSlingServlet {
public static void main（String [] args）引发异常{
try {
String WORKSPACE = crx.default;
信息库= JcrUtils.getRepository（ http：// localhost：4502 / crx / server）;
javax.jcr.Session会话= repository.login（new SimpleCredentials（ admin， admin .toCharArray（）），WORKSPACE）;
节点root1 = session.getRootNode（）;
Node node =（（Node）root1）.getNode（ / content / act / GSAEvents）;
System.out.println（node.getPath（））;
System.out.println（node.getProperty（ message）。getString（））;
}
catch（例外ex）{
//一个真正的程序需要处理该异常
System.out.println（ error： + ex）;
}
}}
I am having some issues connecting to the JCR repository within AEM 6.0. When I get to the point of creating a session on the repostory I get a
javax.jcr.lock.LockException: Precondition Failed.
stacktrace: javax.jcr.lock.LockException: Precondition Failed at org.apache.jackrabbit.spi2dav.ExceptionConverter.generate(ExceptionConverter.java:109) at org.apache.jackrabbit.spi2dav.ExceptionConverter.generate(ExceptionConverter.java:51) at org.apache.jackrabbit.spi2dav.ExceptionConverter.generate(ExceptionConverter.java:45) at org.apache.jackrabbit.spi2dav.RepositoryServiceImpl.obtain(RepositoryServiceImpl.java:809) at org.apache.jackrabbit.spi2dav.RepositoryServiceImpl.obtain(RepositoryServiceImpl.java:753) at org.apache.jackrabbit.spi2davex.RepositoryServiceImpl.obtain(RepositoryServiceImpl.java:307) at org.apache.jackrabbit.jcr2spi.RepositoryImpl.login(RepositoryImpl.java:151) at org.apache.jackrabbit.commons.AbstractRepository.login(AbstractRepository.java:123) at org.test.CallSlingServlet.main(CallSlingServlet.java:63) Caused by: org.apache.jackrabbit.webdav.DavException: Precondition Failed at org.apache.jackrabbit.webdav.client.methods.DavMethodBase.getResponseException(DavMethodBase.java:162) at org.apache.jackrabbit.webdav.client.methods.DavMethodBase.getResponseBodyAsMultiStatus(DavMethodBase.java:91) at org.apache.jackrabbit.spi2dav.RepositoryServiceImpl.obtain(RepositoryServiceImpl.java:781) ... 5 more error: javax.jcr.lock.LockException: Precondition Failed
sample code used by me .
package org.test;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import javax.jcr.Node;
import javax.jcr.Repository;
import javax.jcr.SimpleCredentials;
import org.apache.jackrabbit.commons.JcrUtils;
import com.google.api.client.repackaged.org.apache.commons.codec.binary.Base64;
import com.google.enterprise.apis.client.GsaClient;
import com.google.enterprise.apis.client.GsaEntry;
import com.google.enterprise.apis.client.GsaFeed;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
public class CallSlingServlet {
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
try {
Repository repository = JcrUtils.getRepository("http://localhost:4502/crx/server");
javax.jcr.Session session = repository.login( new SimpleCredentials("admin", "admin".toCharArray()));
Node root1 = session.getRootNode();
Node node = ((Node) root1).getNode("/content/act/GSAEvents");
System.out.println(node.getPath());
System.out.println(node.getProperty("message").getString());
}
catch ( Exception ex ) {
// a real program would need to handle this exception
System.out.println( "error: "+ex);
}
}}
Inside a JCR repository, content is organized into one or more workspaces, each of which holds of a hierarchical structure of nodes and properties. So to create a jcr session & access node and properties you have to pass workspace with credentials, Default AEM workspace is crx.default
Try below code
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import javax.jcr.Node;
import javax.jcr.Repository;
import javax.jcr.SimpleCredentials;
import org.apache.jackrabbit.commons.JcrUtils;
public class CallSlingServlet {
public static void main(String[] args) throws Exception {
try {
String WORKSPACE = "crx.default";
Repository repository = JcrUtils.getRepository("http://localhost:4502/crx/server");
javax.jcr.Session session = repository.login( new SimpleCredentials("admin", "admin".toCharArray()),WORKSPACE);
Node root1 = session.getRootNode();
Node node = ((Node) root1).getNode("/content/act/GSAEvents");
System.out.println(node.getPath());
System.out.println(node.getProperty("message").getString());
}
catch ( Exception ex ) {
// a real program would need to handle this exception
System.out.println( "error: "+ex);
}
}}
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