Develop Reference

Listing my Azure permissions from Azure Java SDK

There is Azure API for listing my own permissions. It's partially documented in Azure API Permissions doc (thought they miss the per-subscription case in documentation).
I am struggling to find a way how to call this API via Azure Java SDK - there is Access Management interface accessible via .accessManagement() method, but that contains methods for listing roles and role assignments, not for listing the actual permissions.
Is this missing from the SDK or am I just searching badly?

Sometimes Azure SDK lacks some functionality. And I also checked the java SDK source seems there is no such interface to call this API directly.
So you have 2 options here:
1. Get the role assignments so that you can get the actual role ID, use this role ID you can get the role actual permissions by code below:
Set<Permission> permissions = azureResourceManager.accessManagement().roleDefinitions().getById(
"{role id}")
.permissions();
2. Call the REST API directly, just try the code below:
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.stream.Collectors;
import com.azure.core.credential.TokenCredential;
import com.azure.core.credential.TokenRequestContext;
import com.azure.core.management.AzureEnvironment;
import com.azure.core.management.profile.AzureProfile;
import com.azure.identity.ClientSecretCredentialBuilder;
import com.google.gson.Gson;
public class testAzureAPI {
public static void main(String[] args) {
AzureProfile azureProfile = new AzureProfile(AzureEnvironment.AZURE);
//I use ClientSecretCredential just for demo here, you can change it your self
TokenCredential tokenCredential = new ClientSecretCredentialBuilder()
.clientId("").clientSecret("")
.tenantId("")
.authorityHost(azureProfile.getEnvironment().getActiveDirectoryEndpoint()).build();
String accessToken = tokenCredential
.getToken(new TokenRequestContext().addScopes("https://management.azure.com/.default")).block()
.getToken();
String reqURL = "https://management.azure.com/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}/providers/Microsoft.Authorization/permissions?api-version=2015-07-01";
try {
URL url = new URL(reqURL);
URLConnection conn = url.openConnection();
conn.setRequestProperty("Authorization", "Bearer " + accessToken);
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String inputLine = in.lines().collect(Collectors.joining());
in.close();
Permissions perms = new Gson().fromJson(inputLine, Permissions.class);
System.out.println(perms.getValue().get(2).getActions());
} catch (Exception e) {
e.printStackTrace();
}
}
public class Value {
public List<String> actions;
public List<Object> notActions;
public List<String> getActions() {
return actions;
}
public void setActions(List<String> actions) {
this.actions = actions;
}
public List<Object> getNotActions() {
return notActions;
}
public void setNotActions(List<Object> notActions) {
this.notActions = notActions;
}
}
public class Permissions {
public List<Value> value;
public List<Value> getValue() {
return value;
}
public void setValue(List<Value> value) {
this.value = value;
}
}
}
I have tested on my side and it works for me perfectly:
Result:
By API:
By code:

WSO2 ESB error on deploying custom mediator

I'm trying to implement a custom mediator in wso2 ESB 4.8.
I used this article as a reference, and reffered to the docs as well, but couldn't get ESB to recognize my xml configuration for my mediator.
I followed all the steps mentioned in the docs, moved the mediator's project .jar to <ESB_HOME>/ repository/components/lib and restarted the server, but I keep receiving the following error during deployment:
ERROR - MediatorFactoryFinder Unknown mediator referenced by configuration element : {http://ws.apache.org/ns/synapse}currencyMediator
Here follows the mediator code:
package org.wso2.esb.tutorial.custom;
import java.util.Iterator;
import javax.xml.namespace.QName;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMNode;
import org.apache.axiom.soap.SOAPBody;
import org.apache.synapse.MessageContext;
import org.apache.synapse.mediators.AbstractMediator;
public class CurrencyMedXML extends AbstractMediator {
private String symbol = "$";
public boolean mediate(MessageContext synCtx) {
// get symbol, last elements of SOAP envelope
SOAPBody body = synCtx.getEnvelope().getBody();
OMElement firstElement = body.getFirstElement();
//Iterator it = firstElement.getChildren();
Iterator it = firstElement.getChildrenWithName(new QName( "return"));
while (it.hasNext()) {
OMNode node = (OMNode)it.next();
if (node.getType()==OMNode.ELEMENT_NODE) {
OMElement ele=(OMElement)node;
String text = ele.getText();
ele.setText(symbol+text);
}
}
return true;
}
public void setSymbol(String sym){
symbol=sym;
}
public String getSymbol(){
return symbol;
}
}
The serializer implementation:
package org.wso2.esb.tutorial.custom;
import org.apache.axiom.om.OMElement;
import org.apache.synapse.Mediator;
import org.apache.synapse.config.xml.AbstractMediatorSerializer;
public class CurrencyMedXMLSerializer extends AbstractMediatorSerializer {
public String getMediatorClassName() {
return CurrencyMedXML.class.getName();
}
#Override
protected OMElement serializeSpecificMediator(Mediator m) {
if (!(m instanceof CurrencyMedXML)) {
handleException("Unsupported mediator passed in for serialization : "
+ m.getType());
}
CurrencyMedXML mediator = (CurrencyMedXML) m;
OMElement CurrencyMediatorElement = fac
.createOMElement(CurrencyMedXMLFactory.CURRENCY_MEDIATOR_Q);
saveTracingState(CurrencyMediatorElement, mediator);
OMElement symbolElement = fac.createOMElement(CurrencyMedXMLFactory.SYMBOL_Q, CurrencyMediatorElement);
symbolElement.setText(mediator.getSymbol());
return CurrencyMediatorElement;
}
}
And the Factory implementation:
package org.wso2.esb.tutorial.custom;
import java.util.Properties;
import javax.xml.namespace.QName;
import org.apache.axiom.om.OMElement;
import org.apache.synapse.Mediator;
import org.apache.synapse.SynapseException;
import org.apache.synapse.config.xml.AbstractMediatorFactory;
import org.apache.synapse.config.xml.XMLConfigConstants;
public class CurrencyMedXMLFactory extends AbstractMediatorFactory {
static final QName CURRENCY_MEDIATOR_Q = new QName(
XMLConfigConstants.SYNAPSE_NAMESPACE, "currencyMediator");
static final QName SYMBOL_Q = new QName(
XMLConfigConstants.SYNAPSE_NAMESPACE, "symbol");
public QName getTagQName() {
return CURRENCY_MEDIATOR_Q;
}
#Override
protected Mediator createSpecificMediator(OMElement elem, Properties properties) {
// create new mediator
CurrencyMedXML newMediator = new CurrencyMedXML();
// setup initial settings
processAuditStatus(newMediator, elem);
OMElement symbolElement = elem.getFirstChildWithName(SYMBOL_Q);
if (symbolElement != null) {
String symbol = symbolElement.getText();
newMediator.setSymbol(symbol);
} else {
throw new SynapseException("default percentage element missing");
}
return newMediator;
}
}
Here's a snippet from the proxy service where I reference the custom mediator:
<outSequence>
<currencyMediator>
<symbol>$</symbol>
</currencyMediator>
<send/>
</outSequence>

I haven't tried that custom tag method. But just for your information, you can call your class mediator like this too.
<class name="samples.mediators.DiscountQuoteMediator">
<property name="discountFactor" value="10"/>
<property name="bonusFor" value="5"/>
</class>

I had the same problem when I created my custom mediator with WSO2 Dev Studio. More Information can be found here.
To solve it, I had to build the mediator using maven from command line.
Hope that helps.

It seems that bundles with defined Fragment-Host synapse-core don't get registered properly. There is a workaround to do it manually.
For details look here

what does this Spring JSON endpoint break in Jboss/Tomcat?

what does this Spring JSON endpoint break in Jboss/Tomcat ? I tried to add this to an existing APPLICATION and It worked until I started refactoring the code and now the errors do not point to anything that is logical to me.
Here is my code a controller and Helper class to keep things clean.
Controller.Java
import java.io.IOException;
import java.util.Properties;
import javax.annotation.Nonnull;
import org.apache.commons.configuration.ConfigurationException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
#Controller
public class PropertiesDisplayController {
#Nonnull
private final PropertiesDisplayHelper propertiesHelper;
/**
* #param propertiesHelper
*/
#Nonnull
#Autowired
public PropertiesDisplayController(#Nonnull final PropertiesDisplayHelper propertiesHelper) {
super();
this.propertiesHelper = propertiesHelper;
}
#Nonnull
#RequestMapping("/localproperties")
public #ResponseBody Properties localProperties() throws ConfigurationException, IOException {
return propertiesHelper.getLocalProperties();
}
#Nonnull
#RequestMapping("/properties")
public #ResponseBody Properties applicationProperties() throws IOException,
ConfigurationException {
return propertiesHelper.getApplicationProperties();
}
}
this would be the Helper.java
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import java.util.TreeMap;
import javax.annotation.Nonnull;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringEscapeUtils;
import org.apache.commons.lang.StringUtils;
public class PropertiesDisplayHelper {
/** Static location of properties in for SSO */
private static String LOCAL_PROPERTIES_LOCATION =
"local.properties";
/** Static strings for masking the passwords and blank values */
private static String NOVALUE = "**NO VALUE**";
/** Static strings for masking the passwords and blank values */
private static String MASKED = "**MASKED**";
#Nonnull
public Properties getApplicationProperties() throws ConfigurationException {
final Properties properties = new Properties();
final Configuration configuration = AppConfiguration.Factory.getConfiguration();
// create a map of properties
final Iterator<?> propertyKeys = configuration.getKeys();
final Map<String, String> sortedProperties = new TreeMap<String, String>();
// loops the configurations and builds the properties
while (propertyKeys.hasNext()) {
final String key = propertyKeys.next().toString();
final String value = configuration.getProperty(key).toString();
sortedProperties.put(key, value);
}
properties.putAll(sortedProperties);
// output of the result
formatsPropertiesData(properties);
return properties;
}
#Nonnull
public Properties getLocalProperties() throws ConfigurationException, IOException {
FileInputStream fis = null;
final Properties properties = new Properties();
// imports file local.properties from specified location
// desinated when the update to openAM12
try {
fis = new FileInputStream(LOCAL_PROPERTIES_LOCATION);
properties.load(fis);
} finally {
// closes file input stream
IOUtils.closeQuietly(fis);
}
formatsPropertiesData(properties);
return properties;
}
void formatsPropertiesData(#Nonnull final Properties properties) {
for (final String key : properties.stringPropertyNames()) {
String value = properties.getProperty(key);
if (StringUtils.isEmpty(value)) {
value = NOVALUE;
} else if (key.endsWith("ssword")) {
value = MASKED;
} else {
value = StringEscapeUtils.escapeHtml(value);
}
// places data to k,v paired properties object
properties.put(key, value);
}
}
}
they set up a json display of the properties in application and from a file for logging. Yet now this no intrusive code seems to break my entire application build.
Here is the error from Jboss
20:33:41,559 ERROR [org.jboss.as.server] (DeploymentScanner-threads - 1) JBAS015870: Deploy of deployment "openam.war" was rolled back with the following failure message:
{"JBAS014671: Failed services" => {"jboss.deployment.unit.\"APPLICATION.war\".STRUCTURE" => "org.jboss.msc.service.StartException in service jboss.deployment.unit.\"APPLICATION.war\".STRUCTURE: JBAS018733: Failed to process phase STRUCTURE of deployment \"APPLICATION.war\"
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS018740: Failed to mount deployment content
Caused by: java.io.FileNotFoundException:APPLICATION.war (Access is denied)"}}
and the Errors from Tomcat
http://pastebin.com/PXdcpqvc
I am at a lost here and think there is something I just do not see.

A simple solution was at hand. The missing component was #Component annotation on the helper class.

How to integrate with ASP.net Web API application from Java Client

I am trying to consume JSON from my ASP.net Web API application, from a Java client.
I able to easily do this from a .net client. But cannot figure out a way to do it in JAVA. I have scoured the web to no avail.
Any help would be sincerely appreciated.
Here is the controller code.
public class OrderController : ApiController
{
private SuperiorPizzaEntities1 db = new SuperiorPizzaEntities1();
// GET api/Order
public IEnumerable<Order> GetOrders()
{
List<Order> orders = db.Orders.ToList();
return orders;
}
... More controller methods here.
}
/// Orders Class
public partial class Order
{
public Order()
{
this.OrderDetails = new HashSet<OrderDetail>();
}
public int OrderID { get; set; }
public int UserID { get; set; }
public System.DateTime CreatedDate { get; set; }
public virtual UserAddress UserAddress { get; set; }
public virtual ICollection<OrderDetail> OrderDetails { get; set; }
}
Java Client Code follows.
This is the code I have written to try to decipher the JSON
/// Java code
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.Object;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.json.*;
import javax.json.stream.*;
import javax.json.stream.JsonParser.Event;
public class JSONReader {
public static void main(String[] args) {
try {
URL url = new URL("http://MyServer/WebAPIs/api/Order");
InputStream is = url.openStream();
JsonParser parser = Json.createParser(is);
{
while (parser.hasNext())
{
Event e = parser.next();
if (e == Event.KEY_NAME)
{
switch (parser.getString())
{
case "name":
parser.next();
System.out.print(parser.getString());
System.out.print(": ");
break;
case "message":
parser.next();
System.out.println(parser.getString());
System.out.println("---------");
break;
default:
//parser.next();
System.out.println(parser.getString());
System.out.println("---------");
break;
}
}
}
}
}
catch(IOException exc)
{
System.out.println("There was an error creating the HTTP Call: " + exc.toString());
}
}
Thanks again

I would try to get away from the manual parsing of the Json. I use the Google GSON library to serialize JSON into an actual java class instance. Here is a quick example.
// standard import statements
// ....
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
public class MyItem
{
public String name;
public String message;
}
/// ... calling code
Gson gson = new Gson();
// hypotehtical call to HTTP endpoint for JSON
String fullJSONListText = getFullJSONFromURL();
// JSON array example e.g: [{name: 'test', message: 'hello}, ...]
Type listType = new TypeToken<List<MyItem>>(){}.getType();
List<MyItem> results = gson.fromJson(fullJSONListText, listType);
//JSON object example
// hypotehtical call to another HTTP endpoint again
String fullJSONObjectText = getFullJSONObjectFromURL();
Type objType = new TypeToken<MyItem>(){}.getType();
MyItem result = gson.fromJson(fullJSONObjectText, objType);

How to call Fedora Commons findObjects method (web service)

I'm trying to make a search through the Fedora Commons web service. I'm interested in the findObjects method. How can I make a search in Java equal to the example described on the findObjects syntax documentation.
I'm particularly interested in this type of request:
http://localhost:8080/fedora/search?terms=fedora&pid=true&title=true
I'll attach some code, I have a class that can call my Fedora service already.
package test.fedora;
import info.fedora.definitions._1._0.types.DatastreamDef;
import info.fedora.definitions._1._0.types.MIMETypedStream;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.List;
import javax.xml.ws.BindingProvider;
import org.w3c.dom.Document;
public class FedoraAccessor {
info.fedora.definitions._1._0.api.FedoraAPIAService service;
info.fedora.definitions._1._0.api.FedoraAPIA port;
final String username = "xxxx";
final String password = "yyyy";
public FedoraAClient() {
service = new info.fedora.definitions._1._0.api.FedoraAPIAService();
port = service.getFedoraAPIAServiceHTTPPort();
((BindingProvider) port.getRequestContext().put(BindingProvider.USERNAME_PROPERTY, username);
((BindingProvider) port).getRequestContext().put(BindingProvider.PASSWORD_PROPERTY, password);
}
public List findObjects() {
//how?
}
public List<DatastreamDef> listDatastreams(String pid, String asOfTime) {
List<DatastreamDef> result = null;
try {
result = port.listDatastreams(pid, asOfTime);
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}
}

It's easier using the client from mediashelf (http://mediashelf.github.com/fedora-client/). Here's an example searching for objects containing the string foobar in the title:
#Test
public void doTest() throws FedoraClientException {
connect();
FindObjectsResponse response = null;
response = findObjects().pid().title().query("title~foobar").execute(fedoraClient);
List<String> pids = response.getPids();
List<String> titles = new ArrayList<String>();
for (String pid : pids) {
titles.add(response.getObjectField(pid, "title").get(0));
}
assertEquals(7, titles.size());
}