/// <summary>Create a service classpath</summary>
/// <param name="user">username or ""</param>
/// <param name="serviceClass">service name</param>
/// <returns>a full path</returns>
public static string ServiceclassPath(string user, string serviceClass)
{
string services = RegistryPathUtils.Join(HomePathForUser(user), RegistryConstants
.PathUserServices);
return(RegistryPathUtils.Join(services, serviceClass));
}
/// <summary>
/// List children of a directory and retrieve their
/// <see cref="Org.Apache.Hadoop.Registry.Client.Types.RegistryPathStatus"/>
/// values.
/// <p>
/// This is not an atomic operation; A child may be deleted
/// during the iteration through the child entries. If this happens,
/// the <code>PathNotFoundException</code> is caught and that child
/// entry ommitted.
/// </summary>
/// <param name="path">path</param>
/// <returns>
/// a possibly empty map of child entries listed by
/// their short name.
/// </returns>
/// <exception cref="Org.Apache.Hadoop.FS.PathNotFoundException">path is not in the registry.
/// </exception>
/// <exception cref="Org.Apache.Hadoop.Registry.Client.Exceptions.InvalidPathnameException
/// ">the path is invalid.</exception>
/// <exception cref="System.IO.IOException">Any other IO Exception</exception>
public static IDictionary <string, RegistryPathStatus> StatChildren(RegistryOperations
registryOperations, string path)
{
IList <string> childNames = registryOperations.List(path);
IDictionary <string, RegistryPathStatus> results = new Dictionary <string, RegistryPathStatus
>();
foreach (string childName in childNames)
{
string child = RegistryPathUtils.Join(path, childName);
try
{
RegistryPathStatus stat = registryOperations.Stat(child);
results[childName] = stat;
}
catch (PathNotFoundException pnfe)
{
if (Log.IsDebugEnabled())
{
Log.Debug("stat failed on {}: moved? {}", child, pnfe, pnfe);
}
}
}
// and continue
return(results);
}
public virtual void TestParentOf()
{
NUnit.Framework.Assert.AreEqual("/", RegistryPathUtils.ParentOf("/a"));
NUnit.Framework.Assert.AreEqual("/", RegistryPathUtils.ParentOf("/a/"));
NUnit.Framework.Assert.AreEqual("/a", RegistryPathUtils.ParentOf("/a/b"));
NUnit.Framework.Assert.AreEqual("/a/b", RegistryPathUtils.ParentOf("/a/b/c"));
}
/// <exception cref="System.IO.IOException"/>
private static void AssertCreatedPathEquals(string expected, string @base, string
path)
{
string fullPath = RegistryPathUtils.CreateFullPath(@base, path);
NUnit.Framework.Assert.AreEqual("\"" + @base + "\" + \"" + path + "\" =\"" + fullPath
+ "\"", expected, fullPath);
}
public virtual void TestLastPathEntry()
{
NUnit.Framework.Assert.AreEqual(string.Empty, RegistryPathUtils.LastPathEntry("/"
));
NUnit.Framework.Assert.AreEqual(string.Empty, RegistryPathUtils.LastPathEntry("//"
));
NUnit.Framework.Assert.AreEqual("c", RegistryPathUtils.LastPathEntry("/a/b/c"));
NUnit.Framework.Assert.AreEqual("c", RegistryPathUtils.LastPathEntry("/a/b/c/"));
}
/// <exception cref="Org.Apache.Hadoop.Registry.Client.Exceptions.InvalidPathnameException
/// "/>
private void AssertInvalidPath(string path)
{
try
{
RegistryPathUtils.ValidateElementsAsDNS(path);
NUnit.Framework.Assert.Fail("path considered valid: " + path);
}
catch (InvalidPathnameException)
{
}
}
public virtual void TestSplitting()
{
NUnit.Framework.Assert.AreEqual(1, RegistryPathUtils.Split("/a").Count);
NUnit.Framework.Assert.AreEqual(0, RegistryPathUtils.Split("/").Count);
NUnit.Framework.Assert.AreEqual(3, RegistryPathUtils.Split("/a/b/c").Count);
NUnit.Framework.Assert.AreEqual(3, RegistryPathUtils.Split("/a/b/c/").Count);
NUnit.Framework.Assert.AreEqual(3, RegistryPathUtils.Split("a/b/c").Count);
NUnit.Framework.Assert.AreEqual(3, RegistryPathUtils.Split("/a/b//c").Count);
NUnit.Framework.Assert.AreEqual(3, RegistryPathUtils.Split("//a/b/c/").Count);
IList <string> split = RegistryPathUtils.Split("//a/b/c/");
NUnit.Framework.Assert.AreEqual("a", split[0]);
NUnit.Framework.Assert.AreEqual("b", split[1]);
NUnit.Framework.Assert.AreEqual("c", split[2]);
}
/// <summary>Buld the user path -switches to the system path if the user is "".</summary>
/// <remarks>
/// Buld the user path -switches to the system path if the user is "".
/// It also cross-converts the username to ascii via punycode
/// </remarks>
/// <param name="username">username or ""</param>
/// <returns>the path to the user</returns>
public static string HomePathForUser(string username)
{
Preconditions.CheckArgument(username != null, "null user");
// catch recursion
if (username.StartsWith(RegistryConstants.PathUsers))
{
return(username);
}
if (username.IsEmpty())
{
return(RegistryConstants.PathSystemServices);
}
// convert username to registry name
string convertedName = ConvertUsername(username);
return(RegistryPathUtils.Join(RegistryConstants.PathUsers, RegistryPathUtils.EncodeForRegistry
(convertedName)));
}
/// <summary>
/// Extract all service records under a list of stat operations...this
/// skips entries that are too short or simply not matching
/// </summary>
/// <param name="operations">operation support for fetches</param>
/// <param name="parentpath">path of the parent of all the entries</param>
/// <param name="stats">Collection of stat results</param>
/// <returns>a possibly empty map of fullpath:record.</returns>
/// <exception cref="System.IO.IOException">for any IO Operation that wasn't ignored.
/// </exception>
public static IDictionary <string, ServiceRecord> ExtractServiceRecords(RegistryOperations
operations, string parentpath, ICollection <RegistryPathStatus> stats)
{
IDictionary <string, ServiceRecord> results = new Dictionary <string, ServiceRecord
>(stats.Count);
foreach (RegistryPathStatus stat in stats)
{
if (stat.size > ServiceRecord.RecordType.Length)
{
// maybe has data
string path = RegistryPathUtils.Join(parentpath, stat.path);
try
{
ServiceRecord serviceRecord = operations.Resolve(path);
results[path] = serviceRecord;
}
catch (EOFException)
{
if (Log.IsDebugEnabled())
{
Log.Debug("data too short for {}", path);
}
}
catch (InvalidRecordException)
{
if (Log.IsDebugEnabled())
{
Log.Debug("Invalid record at {}", path);
}
}
catch (NoRecordException)
{
if (Log.IsDebugEnabled())
{
Log.Debug("No record at {}", path);
}
}
}
}
return(results);
}
public virtual void TestSplittingEmpty()
{
NUnit.Framework.Assert.AreEqual(0, RegistryPathUtils.Split(string.Empty).Count);
NUnit.Framework.Assert.AreEqual(0, RegistryPathUtils.Split("/").Count);
NUnit.Framework.Assert.AreEqual(0, RegistryPathUtils.Split("///").Count);
}
/// <summary>
/// Get the current user path formatted for the registry
/// <p>
/// In an insecure cluster, the environment variable
/// <code>HADOOP_USER_NAME </code> is queried <i>first</i>.
/// </summary>
/// <remarks>
/// Get the current user path formatted for the registry
/// <p>
/// In an insecure cluster, the environment variable
/// <code>HADOOP_USER_NAME </code> is queried <i>first</i>.
/// <p>
/// This means that in a YARN container where the creator set this
/// environment variable to propagate their identity, the defined
/// user name is used in preference to the actual user.
/// <p>
/// In a secure cluster, the kerberos identity of the current user is used.
/// </remarks>
/// <returns>the encoded shortname of the current user</returns>
/// <exception cref="Sharpen.RuntimeException">
/// if the current user identity cannot be determined
/// from the OS/kerberos.
/// </exception>
public static string CurrentUser()
{
string shortUserName = CurrentUsernameUnencoded();
return(RegistryPathUtils.EncodeForRegistry(shortUserName));
}
/// <summary>Create the path to a service record for a component</summary>
/// <param name="user">username or ""</param>
/// <param name="serviceClass">service name</param>
/// <param name="serviceName">service name unique for that user and service class</param>
/// <param name="componentName">unique name/ID of the component</param>
/// <returns>a full path</returns>
public static string ComponentPath(string user, string serviceClass, string serviceName
, string componentName)
{
return(RegistryPathUtils.Join(ComponentListPath(user, serviceClass, serviceName),
componentName));
}
/// <exception cref="System.Exception"/>
public virtual void TestParentOfRoot()
{
RegistryPathUtils.ParentOf("/");
}
/// <summary>Create a path for listing components under a service</summary>
/// <param name="user">username or ""</param>
/// <param name="serviceClass">service name</param>
/// <param name="serviceName">service name unique for that user and service class</param>
/// <returns>a full path</returns>
public static string ComponentListPath(string user, string serviceClass, string serviceName
)
{
return(RegistryPathUtils.Join(ServicePath(user, serviceClass, serviceName), RegistryConstants
.SubpathComponents));
}
/// <summary>Create a path to a service under a user and service class</summary>
/// <param name="user">username or ""</param>
/// <param name="serviceClass">service name</param>
/// <param name="serviceName">service name unique for that user and service class</param>
/// <returns>a full path</returns>
public static string ServicePath(string user, string serviceClass, string serviceName
)
{
return(RegistryPathUtils.Join(ServiceclassPath(user, serviceClass), serviceName));
}
// Is this valid? assertInvalidPath("/50");
/// <exception cref="Org.Apache.Hadoop.Registry.Client.Exceptions.InvalidPathnameException
/// "/>
private void AssertValidPath(string path)
{
RegistryPathUtils.ValidateZKPath(path);
}
public virtual void TestFormatIdempotent()
{
AssertConverted("xn--lzg", RegistryPathUtils.EncodeForRegistry(Euro));
}
protected internal virtual void AssertConverted(string expected, string @in)
{
string @out = RegistryPathUtils.EncodeForRegistry(@in);
NUnit.Framework.Assert.AreEqual("Conversion of " + @in, expected, @out);
}
