com.tangosol.internal.net.management.MBeanCollectorFunction Maven / Gradle / Ivy
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/*
* Copyright (c) 2000, 2021, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.internal.net.management;
import com.tangosol.net.CacheFactory;
import com.tangosol.net.Member;
import com.tangosol.net.management.MBeanAccessor;
import com.tangosol.net.management.MBeanHelper.QueryExpFilter;
import com.tangosol.net.management.Registry;
import com.tangosol.util.Base;
import com.tangosol.util.SetMap;
import com.tangosol.util.ValueExtractor;
import com.tangosol.util.extractor.ReflectionExtractor;
import com.tangosol.util.filter.AlwaysFilter;
import com.tangosol.util.filter.NeverFilter;
import com.tangosol.util.filter.RegexFilter;
import com.tangosol.util.function.Remote;
import com.tangosol.util.stream.RemoteCollectors;
import javax.management.AttributeNotFoundException;
import javax.management.InstanceNotFoundException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanInfo;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.QueryExp;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.TabularDataSupport;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.function.BiConsumer;
import java.util.function.BinaryOperator;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.function.ToLongFunction;
import java.util.regex.PatternSyntaxException;
import java.util.stream.Collector;
/**
* MBeanCollectorFunction is {@link Function} that provided with an {@link
* MBeanServer} will return a Map of MBean attributes with each attribute being
* aggregated or listed. The type of aggregation to be performed is based on
* the collector associated to each attribute. The collector is derived based
* on precedence order as specified in the {@link CacheMBeanAttribute} and {@link
* ServiceMBeanAttribute} docs.
*
* @author hr 2016.09.28
* @since 12.2.1.4.0
*/
public class MBeanCollectorFunction
implements Remote.Function>
{
// ----- constructors ---------------------------------------------------
/**
* Construct an MBeanCollectorFunction function.
*
* @param sLocator either a regex to be applied against nodeids or a role name
* @param sAttribute the attribute to return
* @param sCollector the collector to use instead of the default
* @param query the MBean Object query to use
*/
public MBeanCollectorFunction(String sLocator,
String sAttribute,
String sCollector,
MBeanAccessor.QueryBuilder.ParsedQuery query)
{
f_sLocator = sLocator;
f_sAttribute = sAttribute;
f_sCollector = sCollector;
f_query = query;
}
@Override
public Map apply(MBeanServer mbs)
{
boolean fAllAttributes = isOmitted(f_sAttribute);
QueryExp query = createQuery();
String sObjectQuery = f_query.getQuery();
// populate a map of attribute names to a collection of ObjectNames
IdentityHashMap, Collection> mapObjectNames = new IdentityHashMap<>(2);
ObjectName objName = null;
try
{
objName = new ObjectName(sObjectQuery);
}
catch(MalformedObjectNameException e)
{
throw new IllegalArgumentException("Malformed ObjectName: '" + objName + "', Query: '" + query + '\'', e);
}
Collection colNames;
try
{
colNames = mbs.queryNames(objName, query);
}
catch (RuntimeException e)
{
throw new IllegalArgumentException("Illegal query; ObjectName: '" + objName + "', Query: '" + query + '\'', e);
}
Iterator iterNames = colNames.iterator();
if (iterNames.hasNext())
{
try
{
MBeanInfo info = mbs.getMBeanInfo(iterNames.next());
MBeanAttributeInfo[] aAttribute = info.getAttributes();
Set setAttributeName = new HashSet<>(aAttribute.length);
for (MBeanAttributeInfo attribute : aAttribute)
{
setAttributeName.add(attribute.getName());
}
mapObjectNames.put(setAttributeName, colNames);
}
catch (InstanceNotFoundException ex)
{
// ignore when MBean unregistered between query and request for its info/attributes
CacheFactory.log("MBeanCollector#apply(objName=" + objName +
"): ignoring InstanceNotFoundException: " + ex.getMessage(), Base.LOG_QUIET);
}
catch (Exception e)
{
throw Base.ensureRuntimeException(e);
}
}
// validate the requested attribute exists on the MBean being queried
if (!fAllAttributes)
{
for (Iterator> iter = mapObjectNames.keySet().iterator(); iter.hasNext(); )
{
Set setAttributeName = iter.next();
// mutating the key of a hash container is generally erroneous
// but identity based maps are an exception
setAttributeName.retainAll(Collections.singletonList(f_sAttribute));
if (setAttributeName.isEmpty())
{
iter.remove();
}
}
if (mapObjectNames.isEmpty())
{
throw Base.ensureRuntimeException(new AttributeNotFoundException(
"Attribute \"" + f_sAttribute + "\" cannot be found"));
}
}
// create a collector capable of aggregating each MBean attribute
Collector, Map> collector =
createCollector(objName, f_sCollector, mbs);
BiConsumer, MBeanSnapshot> accumulator = collector.accumulator();
Map mapResult = collector.supplier().get();
MBeanSnapshot snapshot = new MBeanSnapshot();
for (Map.Entry, Collection> entry : mapObjectNames.entrySet())
{
Set setAttributeNames = entry.getKey();
for (ObjectName objectName : entry.getValue())
{
Map mapAttributes = new SetMap<>(setAttributeNames,
sAttributeName ->
{
try
{
return mbs.getAttribute(objectName, sAttributeName);
}
catch (InstanceNotFoundException ex)
{
// ignore when MBean unregistered between query and request for its attributes
CacheFactory.log("MBeanCollectorFunction#apply(objName=" + objectName + ",attribute=" + sAttributeName + "): ignoring InstanceNotFoundException: " + ex.getMessage(), Base.LOG_QUIET);
return null;
}
catch (Exception e)
{
throw Base.ensureRuntimeException(e);
}
});
accumulator.accept(mapResult, snapshot.reset(objectName, mapAttributes));
}
}
mapResult = collector.finisher().apply(mapResult);
return mapResult;
}
// ----- helpers --------------------------------------------------------
/**
* Return a {@link QueryExp} based on the 'locator' this Function was
* constructed with.
*
* Note: the locator can be a regular expression based on member ids or
* role names.
*
* @return a QueryExp based on the 'locator'
*/
protected QueryExp createQuery()
{
String sNodeIdRegex = f_sLocator;
if (isOmitted(sNodeIdRegex))
{
return new QueryExpFilter(AlwaysFilter.INSTANCE());
}
try
{
if (sNodeIdRegex.matches(".*[A-Za-z]+.*")) // role-name based locator
{
// role based locator
StringBuilder sb = new StringBuilder();
String sDelim = "";
Set setMembers = CacheFactory.ensureCluster().getMemberSet();
for (Member member : setMembers)
{
if (member.getRoleName().matches(sNodeIdRegex))
{
sb.append(sDelim).append(member.getId());
sDelim = "|";
}
}
sNodeIdRegex = sb.toString();
}
}
catch (PatternSyntaxException e)
{
throw new IllegalArgumentException("Invalid Regular Expression: '" + sNodeIdRegex + "'", e);
}
return new QueryExpFilter(sNodeIdRegex.isEmpty()
? NeverFilter.INSTANCE()
: new RegexFilter<>(new ReflectionExtractor("getKeyProperty",
new Object[]{"nodeId"}), sNodeIdRegex));
}
// ----- static helpers -------------------------------------------------
/**
* Return a {@link Collector} to be used to process various MBeans.
*
* @param objName the ObjectName of the MBean(s)
* @param sCollector the collector to use
*
* @param the Collectors supplied, accumulated and finished type
*
* @return a {@link Collector} to be used to process various MBeans
*/
protected static > Collector
createCollector(ObjectName objName,
String sCollector,
MBeanServer mbs)
{
if (sCollector == null || sCollector.isEmpty())
{
Supplier supplier = RemoteCollectors::toList;
Class clzEnum;
String sType = objName.getKeyProperty("type");
if (sType == null)
{
return new MultiAttributeCollector(supplier, null, mbs);
}
switch (sType)
{
case "Cache":
clzEnum = CacheMBeanAttribute.class;
break;
case "Service":
clzEnum = ServiceMBeanAttribute.class;
break;
default:
supplier = null;
clzEnum = null;
}
return new MultiAttributeCollector(supplier, clzEnum, mbs);
}
return new MultiAttributeCollector(() -> createAttributeCollector(sCollector));
}
/**
* Return a {@link Collector} based on the provided collector name.
*
* @param sCollector the name of the Collector
*
* @return a Collector based on the provided collector name
*/
public static Collector createAttributeCollector(String sCollector)
{
switch (sCollector.toLowerCase())
{
case "all":
return RemoteCollectors.summarizingLong(TO_LONG_FUNCTION);
case "avg":
return RemoteCollectors.averagingLong(TO_LONG_FUNCTION);
case "count":
return RemoteCollectors.counting();
case "list":
return RemoteCollectors.toList();
case "max":
return RemoteCollectors.maxBy(COMPARABLE_COMPARATOR);
case "min":
return RemoteCollectors.minBy(COMPARABLE_COMPARATOR);
case "set":
return RemoteCollectors.toSet();
case "sum":
return RemoteCollectors.summingLong(TO_LONG_FUNCTION);
case "intsummary":
return RemoteCollectors.summarizingInt(TO_INT_FUNCTION);
case "longsummary":
return RemoteCollectors.summarizingLong(TO_LONG_FUNCTION);
case "doublesummary":
return RemoteCollectors.summarizingDouble(TO_DOUBLE_FUNCTION);
default:
throw new IllegalArgumentException(
"The specified collector is not recognized: " + sCollector);
}
}
/**
* Return true if the provided string represents a wildcard / 'all' request.
*
* @param s the string to be interrogated
*
* @return true if the provided string represents a wildcard / 'all' request
*/
protected static boolean isOmitted(String s)
{
return s == null || "*".equals(s) || "all".equals(s);
}
// ----- inner class: MBeanSnapshot -------------------------------------
/**
* A holder for an MBean's ObjectName and its data.
*/
protected static class MBeanSnapshot
{
// ----- helpers ----------------------------------------------------
/**
* Reset the state of this MBeanSnapshot based on the provided ObjectName
* and Map of attribute data.
*
* @param objName the object name
* @param mapAttributes the attribute values
*
* @return this MBeanSnapshot
*/
protected MBeanSnapshot reset(ObjectName objName, Map mapAttributes)
{
m_objName = objName;
m_mapAttributes = mapAttributes;
return this;
}
// ----- accessors --------------------------------------------------
/**
* Return the attribute values for this MBean.
*
* @return the attribute values for this MBean
*/
protected Map getAttributes()
{
return m_mapAttributes;
}
/**
* Return the ObjectName this MBean represents.
*
* @return the ObjectName this MBean represents
*/
protected ObjectName getObjectName()
{
return m_objName;
}
// ----- data members -----------------------------------------------
/**
* The ObjectName for this MBean.
*/
protected ObjectName m_objName;
/**
* The attribute values for this MBean.
*/
protected Map m_mapAttributes;
}
// ----- inner class: CachedCollector -----------------------------------
/**
* A CachedCollector avoids multiple calls to the collector methods;
* {@link Collector#supplier() supplier}, {@link Collector#accumulator()
* accumulator}, {@link Collector#combiner() combiner} or {@link Collector#
* finisher finisher}.
*
* @param the type of input elements to the reduction operation
* @param the mutable accumulation type of the reduction operation (often
* hidden as an implementation detail)
* @param the result type of the reduction operation
*/
public static class CachedCollector
implements Collector
{
// ----- constructors -----------------------------------------------
/**
* Construct a CachedCollector based on the provided Collector.
*
* @param collector a Collector to delegate to
*/
public CachedCollector(Collector collector)
{
Objects.requireNonNull(collector);
f_collector = collector;
}
@Override
public Supplier supplier()
{
if (m_supplier == null)
{
m_supplier = f_collector.supplier();
}
return m_supplier;
}
@Override
public BiConsumer accumulator()
{
if (m_accumulator == null)
{
m_accumulator = f_collector.accumulator();
}
return m_accumulator;
}
@Override
public BinaryOperator combiner()
{
if (m_combiner == null)
{
m_combiner = f_collector.combiner();
}
return m_combiner;
}
@Override
public Function finisher()
{
if (m_finisher == null)
{
m_finisher = f_collector.finisher();
}
return m_finisher;
}
@Override
public Set characteristics()
{
return f_collector.characteristics();
}
// ----- data members -----------------------------------------------
/**
* The Collector to delegate to.
*/
protected final Collector f_collector;
/**
* The cached Supplier.
*/
protected Supplier m_supplier;
/**
* The cached accumulator.
*/
protected BiConsumer m_accumulator;
/**
* The cached combiner.
*/
protected BinaryOperator m_combiner;
/**
* The cache finisher.
*/
protected Function m_finisher;
}
// ----- inner class: MultiAttributeCollector ---------------------------
/**
* A {@link Collector} implementation that operates against a
* Map<String,Object>. Each entry in the Map represents an attribute
* and its value. Each attribute has its own collector to use and can be
* specified at three levels:
*
* - Request - 'collector' matrix parameter is specified and takes
* precedence
* - Attribute - each attribute may specify the appropriate collector
* to use within the respective Enum definition
* - Default - if none of the above a list collector is used
*
* This Collector will ensure the appropriate Collector is used to aggregate
* each attribute in the MBean.
*
* @param the type being operated against
*/
protected static class MultiAttributeCollector>
extends AbstractMultiCollector
{
// ----- constructors -----------------------------------------------
/**
* Construct a MultiAttributeCollector.
*
* @param supplierCollector a {@link Supplier} that provides a Collector
* to use for all attributes being aggregated
*/
protected MultiAttributeCollector(Supplier> supplierCollector)
{
this(supplierCollector, null, null);
}
/**
* Construct a MultiAttributeCollector.
*
* @param clzEnum an Enum Class that represents the MBean
* @param supplierCollector a {@link Supplier} that provides a Collector
* to use if undefined or {@code fUseDefault == true}
*/
protected MultiAttributeCollector(Supplier> supplierCollector,
Class clzEnum, MBeanServer server)
{
f_clzEnum = clzEnum;
f_supplierCollector = supplierCollector;
f_server = server;
}
// ----- Collector interface ----------------------------------------
@Override
public BiConsumer accumulator()
{
return (mapResult, snapshot) ->
{
for (Map.Entry entry : snapshot.getAttributes().entrySet())
{
String sAttribute = entry.getKey();
Object oValue = ATTRIBUTE_NULLIFIER.apply(entry.getValue());
if (oValue == null)
{
continue;
}
Collector collector =
(Collector) f_mapCollector.get(sAttribute);
if (collector == null)
{
collector = findCollector(snapshot.getObjectName(), sAttribute, oValue);
if (collector == null)
{
continue;
}
f_mapCollector.put(sAttribute, new CachedCollector<>(collector));
mapResult.put(sAttribute, collector.supplier().get());
}
collector.accumulator().accept(mapResult.get(sAttribute), oValue);
}
};
}
@Override
public Set characteristics()
{
return null;
}
// ----- helpers ----------------------------------------------------
/**
* Return the derived Collector to use for the given attribute name.
*
* @param objName the ObjectName this attribute is bound to
* @param sAttribute the attribute name
* @param oAttributeValue the attribute value
*
* @return the derived Collector to use for the given attribute name
*/
protected Collector findCollector(ObjectName objName, String sAttribute, Object oAttributeValue)
{
MBeanAttribute enumAttr = getMBeanAttribute(sAttribute);
if (enumAttr == null)
{
try
{
MBeanInfo info = f_server == null ? null : f_server.getMBeanInfo(objName);
MBeanAttributeInfo[] aAttribute = info == null ? new MBeanAttributeInfo[0] : info.getAttributes();
for (MBeanAttributeInfo attrInfo : aAttribute)
{
if (sAttribute.equals(attrInfo.getName()))
{
String sCollector = (String) attrInfo.getDescriptor().getFieldValue(COLLECTOR_DESCRIPTOR);
Collector collector = sCollector == null || sCollector.isEmpty()
? createTypeBasedCollector(oAttributeValue)
: createAttributeCollector(sCollector);
if (collector != null)
{
return collector;
}
}
}
return f_supplierCollector == null ? null : f_supplierCollector.get();
}
catch (InstanceNotFoundException ex)
{
// ignore when MBean unregistered between query and request for MBean info/attributes
CacheFactory.log("MBeanCollectorFunction#findCollector(objName=" + objName + "): ignoring InstanceNotFoundException: " + ex.getMessage(), Base.LOG_QUIET);
return null;
}
catch (Exception e)
{
throw Base.ensureRuntimeException(e);
}
}
return enumAttr.isVisible() ? enumAttr.collector() : null;
}
/**
* Return a looked up MBeanAttribute(enum) or null.
*
* @param sName the name of the MBeanAttribute
*
* @return a looked up MBeanAttribute or null
*/
protected MBeanAttribute getMBeanAttribute(String sName)
{
try
{
return f_clzEnum == null ? null : (MBeanAttribute) Enum.valueOf(f_clzEnum, sName);
}
catch (Throwable ignore) {}
return null;
}
// ----- data members -----------------------------------------------
/**
* The Enum class that represents the MBean attributes.
*/
protected final Class f_clzEnum;
/**
* A Supplier of the default Collector to use.
*/
protected final Supplier> f_supplierCollector;
/**
* The MBeanServer.
*/
protected final MBeanServer f_server;
}
// ----- constants ------------------------------------------------------
/**
* Return a Collector that can operate against known types (integers, longs,
* doubles, floats, CompositeData and TabularDataSupport).
*
* @param oValue the value to create a Collector based on
*
* @return a Collector that can operate against the given type
*/
public static Collector createTypeBasedCollector(Object oValue)
{
if (oValue instanceof Integer)
{
return createAttributeCollector("intsummary");
}
if (oValue instanceof Long)
{
return createAttributeCollector("longsummary");
}
if (oValue instanceof Double)
{
return createAttributeCollector("doublesummary");
}
if (oValue instanceof Float)
{
return createAttributeCollector("doublesummary");
}
if (oValue instanceof CompositeData)
{
return new CompositeDataCollector();
}
if(oValue instanceof TabularDataSupport)
{
return new TabularDataCollector();
}
if (oValue instanceof String)
{
return createAttributeCollector("list");
}
return null;
}
/**
* The separator between service name and cache name.
*/
protected static final char SERVICE_CACHE_SEPARATOR = '!';
/**
* A {@link Comparator} that delegates to Comparable implementations.
*/
protected static final Remote.Comparator