/// <summary>
/// method to perform depth-first search and write the parameters of every
/// queue in JSON format.
/// </summary>
/// <param name="dumpGenerator">
/// JsonGenerator object which takes the dump and flushes
/// to a writer object
/// </param>
/// <param name="rootQueues">the top-level queues</param>
/// <exception cref="Org.Codehaus.Jackson.JsonGenerationException"/>
/// <exception cref="System.IO.IOException"/>
private static void DumpConfiguration(JsonGenerator dumpGenerator, ICollection <Queue
> rootQueues)
{
foreach (Queue queue in rootQueues)
{
dumpGenerator.WriteStartObject();
dumpGenerator.WriteStringField("name", queue.GetName());
dumpGenerator.WriteStringField("state", queue.GetState().ToString());
AccessControlList submitJobList = null;
AccessControlList administerJobsList = null;
if (queue.GetAcls() != null)
{
submitJobList = queue.GetAcls()[ToFullPropertyName(queue.GetName(), QueueACL.SubmitJob
.GetAclName())];
administerJobsList = queue.GetAcls()[ToFullPropertyName(queue.GetName(), QueueACL
.AdministerJobs.GetAclName())];
}
string aclsSubmitJobValue = " ";
if (submitJobList != null)
{
aclsSubmitJobValue = submitJobList.GetAclString();
}
dumpGenerator.WriteStringField("acl_submit_job", aclsSubmitJobValue);
string aclsAdministerValue = " ";
if (administerJobsList != null)
{
aclsAdministerValue = administerJobsList.GetAclString();
}
dumpGenerator.WriteStringField("acl_administer_jobs", aclsAdministerValue);
dumpGenerator.WriteFieldName("properties");
dumpGenerator.WriteStartArray();
if (queue.GetProperties() != null)
{
foreach (KeyValuePair <object, object> property in queue.GetProperties())
{
dumpGenerator.WriteStartObject();
dumpGenerator.WriteStringField("key", (string)property.Key);
dumpGenerator.WriteStringField("value", (string)property.Value);
dumpGenerator.WriteEndObject();
}
}
dumpGenerator.WriteEndArray();
ICollection <Queue> childQueues = queue.GetChildren();
dumpGenerator.WriteFieldName("children");
dumpGenerator.WriteStartArray();
if (childQueues != null && childQueues.Count > 0)
{
DumpConfiguration(dumpGenerator, childQueues);
}
dumpGenerator.WriteEndArray();
dumpGenerator.WriteEndObject();
}
}
/// <summary>
/// Dumps the configuration of hierarchy of queues with
/// the xml file path given.
/// </summary>
/// <remarks>
/// Dumps the configuration of hierarchy of queues with
/// the xml file path given. It is to be used directly ONLY FOR TESTING.
/// </remarks>
/// <param name="out">the writer object to which dump is written to.</param>
/// <param name="configFile">the filename of xml file</param>
/// <exception cref="System.IO.IOException"/>
internal static void DumpConfiguration(TextWriter @out, string configFile, Configuration
conf)
{
if (conf != null && conf.Get(DeprecatedQueueConfigurationParser.MapredQueueNamesKey
) != null)
{
return;
}
JsonFactory dumpFactory = new JsonFactory();
JsonGenerator dumpGenerator = dumpFactory.CreateJsonGenerator(@out);
QueueConfigurationParser parser;
bool aclsEnabled = false;
if (conf != null)
{
aclsEnabled = conf.GetBoolean(MRConfig.MrAclsEnabled, false);
}
if (configFile != null && !string.Empty.Equals(configFile))
{
parser = new QueueConfigurationParser(configFile, aclsEnabled);
}
else
{
parser = GetQueueConfigurationParser(null, false, aclsEnabled);
}
dumpGenerator.WriteStartObject();
dumpGenerator.WriteFieldName("queues");
dumpGenerator.WriteStartArray();
DumpConfiguration(dumpGenerator, parser.GetRoot().GetChildren());
dumpGenerator.WriteEndArray();
dumpGenerator.WriteEndObject();
dumpGenerator.Flush();
}
/// <exception cref="System.IO.IOException"/>
private void WriteAttribute(JsonGenerator jg, string attName, object value)
{
jg.WriteFieldName(attName);
WriteObject(jg, value);
}
