CODEWITHSUNDEEP
aem
Jitender Sharma
Jitender Sharma

Reputation: 11

javax.jcr.lock.LockException:Precondition Failed

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);
        } 
    }}

Upvotes: 1

Views: 759

Answers (1)

Anupam Maiti
Anupam Maiti

Reputation: 1610

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);
            } 
        }}

Upvotes: 2

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