I want to create a series of nodes like parentProduct/subCategory1/subCategory2/subCategory3/subCategory4 inside /var/temp location. I tried to use addNode() method of Node class and createPath() method of JcrUtil class but both did not work. addNode() method just creates only one immediate node(ex, parentProduct) but it is creating second level onwards.
Is there any API available that can create a series of nodes, ex-parentProduct/subCategory1/subCategory2/subCategory3/subCategory4?
protected final void doGet(final SlingHttpServletRequest request, final SlingHttpServletResponse response)
throws IOException {
final Session session;
final ResourceResolver resourceResolver = request.getResourceResolver();
session = resourceResolver.adaptTo(Session.class);
long count = 0;
final String path = "/var/temp";
final PrintWriter out = response.getWriter();
try {
if (session.nodeExists(path)) {
Node jcrNode = session.getNode(path);
jcrNode.addNode("parentProduct/subCategory1/subCategory2/subCategory3/subCategory4");
//jcrNode.addNode("parentProduct");
//JcrUtil.createPath("parentProduct/subCategory1/subCategory2/subCategory3/subCategory4",JcrConstants.NT_UNSTRUCTURED, session);
}
session.save();
} catch (ItemExistsException ex) {
LOG.error("ItemExistsException", ex);
} catch (RepositoryException exp) {
LOG.error("RepositoryException", exp);
} finally {
if (session != null) {
session.logout();
}
}
}
There is more than one way to do it. For example,
import org.apache.sling.api.resource.ResourceUtil;
import org.apache.jackrabbit.JcrConstants;
String path = "/var/temp/parentProduct/subCategory1/subCategory2/subCategory3/subCategory4";
Resource subCategory4 = ResourceUtil.getOrCreateResource(
resourceResolver,
path, // The full path to be created
JcrConstants.NT_UNSTRUCTURED, // resource type of the final resource to create
JcrConstants.NT_UNSTRUCTURED, // resource type of all intermediate resources
true // save chnages
);
Related
class Task implements Runnable
{
private File file;
private String fileName;
public Task(File file, String fileName)
{
this.file = file;
this.fileName = fileName;
}
public void run()
{
try
{
Scanner scanner = new Scanner(file);
while (scanner.hasNextLine())
{
String line = scanner.nextLine();
for(String feature : StaticClass.STATIC_LIST_FEATURES)
{
if(line.contains(feature))
{
if (result.values().contains(feature))
{
List<String> list = result.get(feature);
list.add(fileName);
result.put(feature, list);
break;
}
else
result.put(feature, new ArrayList<>(List.of(fileName)));
}
}
}
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
public class MainClass{
// Maximum number of threads in thread pool
static final int MAX_T = 5;
static final Map<String, List<String>> result = new ConcurrentHashMap<>();
public static void main(String[] args)
{
List<Runnable> runnableList = new ArrayList<Runnable>();
File myObj = new File("JsTsresult.txt");
try
{
Scanner myReader = new Scanner(myObj);
while(myReader.hasNextLine())
{
String data = myReader.nextLine().substring(1);
Runnable runnable = new Task(new File("/webdev/NetLedger_NewGitRepo/", data));
runnableList.add(runnable);
}
ExecutorService pool = Executors.newFixedThreadPool(MAX_T);
for(Runnable task : runnableList)
pool.execute(task);
pool.shutdown();
} catch(Exception e)
{
e.printStackTrace();
}
}
}
I am using threadpool to check if features are mentioned in some files that I have inside a file JSTSResult.txt. This txt file has a list of files. I am reading that file one-by-one and want to create a concurrent hash map where key would be that feature and value would be the list of those files. Here I am using a few tasks and I have initialized ConcurrentHashMap. But, not sure on how to share this ConcurrentHashMap to all those Tasks. I have this way, but of course it won't work. Any suggestions?
You can try creating a method to Task and then synchronized it so that only one thread can add in it at a time.
class Task implements Runnable
{
static final Map<String, List<String>> result = new ConcurrentHashMap<>();
public static synchronized void addToResult()
{
result.put();
}
}
If you want to know what synchronized is.
This is a sample explanation based on a book.
class SpeechSynthesizer
{
synchronized void say( String words )
{
// speak
}
}
Because say() is an instance method, a thread must acquire the lock on the SpeechSynthesizer instance it’s using before it can invoke the say() method. When say() has
completed, it gives up the lock, which allows the next waiting thread to acquire the lock
and run the method. It doesn’t matter whether the thread is owned by the SpeechSyn
thesizer itself or some other object; every thread must acquire the same lock, that of
the SpeechSynthesizer instance. If say() were a class (static) method instead of an
instance method, we could still mark it as synchronized. In this case, because no in‐
stance object is involved, the lock is on the class object itself. -Learning Java
Book by Jonathan Knudsen and Patrick
We have custom workflow which has a process step to trigger rollout [Standard Rollout]. The process step is completing successful but with no rollout performed.
#Component(
service = WorkflowProcess.class,
property = {
"service.description=Workflow description",
"service.vendor=Project",
"process.label=Project"
}
)
public class RolloutProcessStep implements WorkflowProcess {
private static final Logger LOG = LoggerFactory.getLogger(RolloutProcessStep.class);
#Reference
private ResourceResolverFactory resourceResolverFactory;
#Reference
private RolloutManager rolloutManager;
public void execute(WorkItem item, WorkflowSession workflowSession, MetaDataMap args) throws WorkflowException {
try (ResourceResolver resolver = resourceResolverFactory.getServiceResourceResolver(Collections.singletonMap(
ResourceResolverFactory.SUBSERVICE, RolloutProcessStep.class.getName()))) {
triggerRollout(path, resolver);
} catch (LoginException e) {
LOG.error("Error in getting the resolver. Aborting.", e);
throw new WorkflowException("Error in getting the resolver.");
} catch (Exception e) {
LOG.error("Error in during the step. Aborting.", e);
throw new WorkflowException("Error in during the Rollout Process Step.");
}
}
private void triggerRollout(String path, ResourceResolver resolver) {
Resource source = resolver.getResource(path);
if (source == null) {
return;
}
try {
LiveRelationshipManager relationshipManager = resolver.adaptTo(LiveRelationshipManager.class);
PageManager pageManager = resolver.adaptTo(PageManager.class);
// Checks if the given source is the source of a Live Copy relationship.
if (!relationshipManager.isSource(source)) {
LOG.warn("Resource Not a valid source {}.", source);
return;
}
Page page = pageManager.getPage(source.getPath());
if (page == null) {
LOG.warn("Failed to resolve source page {}.", source);
}
final RolloutManager.RolloutParams params = new RolloutManager.RolloutParams();
params.master = page;
params.isDeep = false;
params.reset = false;
params.trigger = RolloutManager.Trigger.ROLLOUT;
LOG.info("RolloutParams {}.", params.toString());
rolloutManager.rollout(params);
} catch (WCMException e) {
LOG.error("Failed to get live relationships.", e);
}
}
}
PS: We have the blueprints configured already and rollouts performed using touch UI is working as expected.
Please let me know if I'm missing anything.
Issue was resolved by providing permission to the service user to access this Process Step.
I am learning zookeeper and trying out the Curator framework for service discoveries. However, I am facing a weird issue that I have difficulties to figure out. The problem is when I tried to register an instance via serviceDiscovery, the cacheChanged event of the serviceCache gets triggered three times. When I removed an instance, it is only triggered once, which is the expected behavior. Please see the code below:
public class DiscoveryExample {
private static String PATH = "/base";
static ServiceDiscovery<InstanceDetails> serviceDiscovery = null;
public static void main(String[] args) throws Exception {
CuratorFramework client = null;
try {
// this is the ip address of my VM
client = CuratorFrameworkFactory.newClient("192.168.149.129:2181", new ExponentialBackoffRetry(1000, 3));
client.start();
JsonInstanceSerializer<InstanceDetails> serializer = new JsonInstanceSerializer<InstanceDetails>(
InstanceDetails.class);
serviceDiscovery = ServiceDiscoveryBuilder.builder(InstanceDetails.class)
.client(client)
.basePath(PATH)
.serializer(serializer)
.build();
serviceDiscovery.start();
ServiceCache<InstanceDetails> serviceCache = serviceDiscovery.serviceCacheBuilder()
.name("product")
.build();
serviceCache.addListener(new ServiceCacheListener() {
#Override
public void stateChanged(CuratorFramework curator, ConnectionState state) {
// TODO Auto-generated method stub
System.out.println("State Changed to " + state.name());
}
// THIS IS THE PART GETS TRIGGERED MULTIPLE TIMES
#Override
public void cacheChanged() {
System.out.println("Cached Changed ");
List<ServiceInstance<InstanceDetails>> list = serviceCache.getInstances();
Iterator<ServiceInstance<InstanceDetails>> it = list.iterator();
while(it.hasNext()) {
System.out.println(it.next().getAddress());
}
}
});
serviceCache.start();
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.print("> ");
String line = in.readLine();
} finally {
CloseableUtils.closeQuietly(serviceDiscovery);
CloseableUtils.closeQuietly(client);
}
}
}
AND
public class RegisterApplicationServer {
final static String PATH = "/base";
static ServiceDiscovery<InstanceDetails> serviceDiscovery = null;
public static void main(String[] args) throws Exception {
CuratorFramework client = null;
try {
client = CuratorFrameworkFactory.newClient("192.168.149.129:2181", new ExponentialBackoffRetry(1000, 3));
client.start();
JsonInstanceSerializer<InstanceDetails> serializer = new JsonInstanceSerializer<InstanceDetails>(
InstanceDetails.class);
serviceDiscovery = ServiceDiscoveryBuilder.builder(InstanceDetails.class).client(client).basePath(PATH)
.serializer(serializer).build();
serviceDiscovery.start();
// SOME OTHER CODE THAT TAKES CARES OF USER INPUT...
} finally {
CloseableUtils.closeQuietly(serviceDiscovery);
CloseableUtils.closeQuietly(client);
}
}
private static void addInstance(String[] args, CuratorFramework client, String command,
ServiceDiscovery<InstanceDetails> serviceDiscovery) throws Exception {
// simulate a new instance coming up
// in a real application, this would be a separate process
if (args.length < 2) {
System.err.println("syntax error (expected add <name> <description>): " + command);
return;
}
StringBuilder description = new StringBuilder();
for (int i = 1; i < args.length; ++i) {
if (i > 1) {
description.append(' ');
}
description.append(args[i]);
}
String serviceName = args[0];
ApplicationServer server = new ApplicationServer(client, PATH, serviceName, description.toString());
server.start();
serviceDiscovery.registerService(server.getThisInstance());
System.out.println(serviceName + " added");
}
private static void deleteInstance(String[] args, String command, ServiceDiscovery<InstanceDetails> serviceDiscovery) throws Exception {
// in a real application, this would occur due to normal operation, a
// crash, maintenance, etc.
if (args.length != 2) {
System.err.println("syntax error (expected delete <name>): " + command);
return;
}
final String serviceName = args[0];
Collection<ServiceInstance<InstanceDetails>> set = serviceDiscovery.queryForInstances(serviceName);
Iterator<ServiceInstance<InstanceDetails>> it = set.iterator();
while (it.hasNext()) {
ServiceInstance<InstanceDetails> si = it.next();
if (si.getPayload().getDescription().indexOf(args[1]) != -1) {
serviceDiscovery.unregisterService(si);
}
}
System.out.println("Removed an instance of: " + serviceName);
}
}
I appriciate if anyone can please point out where I am doing wrong and maybe can share some good materials/examples so I can refer to. The official website and the examples on github does not help a lot.
I have written code for accessing GCS bucket to store files thru API in java which takes JSON credential file. I have created that JSON file from google console. I need to automate the JSON file or key rotation for every 90 days. How to regenerate/rotate that JSON file? I am a newbie to GCS.
import java.io.IOException;
import java.security.GeneralSecurityException;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpMethods;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestFactory;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.iam.v1.Iam;
import com.google.api.services.iam.v1.IamRequest;
import com.google.api.services.iam.v1.IamRequestInitializer;
import com.google.api.services.iam.v1.model.CreateServiceAccountKeyRequest;
public class TestServiceAccount {
public static void main(String[] args) {
// TODO Auto-generated method stub
//ServiceAccountKey key = new ServiceAccountKey();
try {
System.out.println("created");
String KEY = "AIzaSyDjHg2u4bwfvncb_YwdjJC_vUPRYLW5Sh8";
IamRequestInitializer req = new IamRequestInitializer(KEY);
HttpTransport transport;
transport = GoogleNetHttpTransport.newTrustedTransport();
JsonFactory jsonFactory = new JacksonFactory();
Iam iam = new Iam(transport,jsonFactory,new HttpRequestInitializer() {
public void initialize(HttpRequest httpRequest) {
httpRequest.setConnectTimeout(0);
httpRequest.setReadTimeout(0);
}
});
//https://iam.googleapis.com/v1/projects/newsampleproject/serviceAccounts/NewServiceAccount/keys
MyIamRequest<String> request = new MyIamRequest<String>(
iam, HttpMethods.POST, "/v1/projects/newsampleproject/serviceAccounts/NewServiceAccount/keys", String.class, String.class);
req.initialize(request);
System.out.println(req.getKey());
req.initializeJsonRequest(request);
System.out.println(req.getUserIp());
} catch (GeneralSecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
//req.initializeJsonRequest(request);
}
public static HttpRequestFactory createRequestFactory(HttpTransport transport) {
return transport.createRequestFactory(new HttpRequestInitializer() {
public void initialize(HttpRequest request) throws IOException {
}
});
}
}
This what I have written to call the API But i am not sure if this is the way to call it.
try this solution, it worked for me
private static void createNewKey(IamRequestInitializer req) throws IOException, GeneralSecurityException {
Iam iam = jsonAuthentication();
CreateServiceAccountKeyRequest keyRequest = new CreateServiceAccountKeyRequest();
keyRequest.setKeyAlgorithm(KEY_ALGO);
String account = SERVICE_ACCOUNT_URL + SERVICE_ACCOUNT_EMAIL;
iam.projects().serviceAccounts().keys().create(account, keyRequest);
String requestString = BASE_URL + SERVICE_ACCOUNT_EMAIL + KEY;
ServiceAccountKey result = getServiceAccountKey(req, iam, requestString);
String jsonKey = new String(result.decodePrivateKeyData());
System.out.println(jsonKey);
JsonFileUtil.createFile(JSON_KEY_FILE_NAME, jsonKey);
}
private static <T> T getServiceAccountKey(IamRequestInitializer req, Iam iam, String requestString)
throws IOException {
MyIamRequest<String> request = new MyIamRequest<String>(iam, HttpMethods.POST, requestString, String.class,
ServiceAccountKey.class);
request.setKey(API_KEY);
request.setFields(
"keyAlgorithm,name,privateKeyData,privateKeyType,publicKeyData,validAfterTime,validBeforeTime");
req.initializeJsonRequest(request);
System.out.println(request.getRequestHeaders());
return (T) request.execute();
}
If you're using a JSON credential file, you are acting as some particular service account which is a member of your project and has access to the files.
Service accounts can be programmatically controlled for exactly this sort of use case. The IAM Service Account API controls service accounts, and the two methods you want for key rotation are serviceAccount.keys.create() and serviceAccount.keys.delete().
The result of the create() call (if you pass in the private key type TYPE_GOOGLE_CREDENTIALS_FILE), will be a new, valid JSON credential file for your service account.
#user7049946
ServiceAccountKey response = getServiceAccountKey(req, iam, requestString);
CreateNewJson.createFile("NEW_JSON_KEY_FILE_NAME", new String(response.decodePrivateKeyData()));
create new class to convert that conent into new file.
public class CreateNewJson {
public static void createFile(String filename, String content) throws IOException {
FileOutputStream fileOutputStream = null;
File file;
file = new File(filename);
fileOutputStream = new FileOutputStream(file);
if (!file.exists()) {
file.createNewFile();
}else{
file.delete();
file.createNewFile();
}
byte[] contentInBytes = content.getBytes();
fileOutputStream.write(contentInBytes);
fileOutputStream.flush();
fileOutputStream.close();
System.out.println("File Created");
}
}
I'm trying to build a Sling servlet that returns a modified value of a resource from the JCR. I dont want to change the original resource, so I create a SyntheticResource and make my manipulations. I then return it back using the RequestDispatcher.
The following code doesn't return the Modified content as expected and I don't see any errors in the log either. Can you tell me what I'm doing wrong here
#SlingServlet(methods = "GET", resourceTypes = "sling/components/test", selectors = "test")
public class TestServlet extends SlingSafeMethodsServlet {
/**
*
*/
private static final long serialVersionUID = 4078524820231933974L;
private final Logger log = LoggerFactory.getLogger(getClass());
#Reference
ResourceResolverFactory resolverFactory;
protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) throws IOException {
Map<String, Object> param = new HashMap<String, Object>();
ResourceResolver resolver = null;
response.setContentType("text/html");
StringWriterResponse writerResponse = new StringWriterResponse(response);
PrintWriter writer = response.getWriter();
try {
param.put(ResourceResolverFactory.SUBSERVICE, "testService");
final String path = request.getRequestPathInfo().getResourcePath();
resolver = resolverFactory.getServiceResourceResolver(param);
final Resource resource = resolver.getResource(path);
String resourceType = resource.getResourceType();
Resource testResource = new SyntheticResource(resolver,
path, resourceType) {
public <T> T adaptTo(Class<T> type) {
if (type == ValueMap.class) {
ModifiableValueMap map = resource
.adaptTo(ModifiableValueMap.class);
map.put("jcr:title", "Modified Title");
return (T)map;
}
return super.adaptTo(type);
}
};
RequestDispatcherOptions requestDispatcherOptions = new RequestDispatcherOptions();
requestDispatcherOptions.setReplaceSelectors("");
final RequestDispatcher requestDispatcher = request.getRequestDispatcher(testResource, requestDispatcherOptions);
requestDispatcher.forward(request, writerResponse);
// log.debug( writerResponse.getString() );
writer.println(writerResponse.getString());
response.setStatus(HttpServletResponse.SC_OK );
} catch (Exception e) {
log.error("Exception: ", e);
} finally {
if( resolver != null) {
resolver.close();
}
if( writer != null ){
writer.close();
}
if (writerResponse != null) {
writerResponse.clearWriter();
}
}
}
}
Using a ResourceDecorator would be simpler, it can return a ResourceWrapper that implements the required changes. Just be careful to keep the decorator's decorate method efficient when it's called for a Resource that it doesn't want to decorate, as it will be called for all Resources.