/// <summary>
/// Determine among the passed in filter parameters any parameter that matches the given index on property name and
/// filter operator type. Returns null if none of the parameters matches the index.
/// </summary>
/// <param name="parameters">is the filter parameter list</param>
/// <param name="index">is a filter parameter constant value index</param>
/// <returns>filter parameter, or null if no matching parameter found.</returns>
public static FilterValueSetParam FindParameter(
ArrayDeque<FilterValueSetParam> parameters,
FilterParamIndexBase index)
{
if (index is FilterParamIndexLookupableBase) {
var propBasedIndex = (FilterParamIndexLookupableBase) index;
var indexLookupable = propBasedIndex.Lookupable;
var indexOperator = propBasedIndex.FilterOperator;
foreach (var parameter in parameters) {
var lookupable = parameter.Lookupable;
var paramOperator = parameter.FilterOperator;
if (lookupable.Equals(indexLookupable) &&
paramOperator.Equals(indexOperator)) {
return parameter;
}
}
}
else {
foreach (var parameter in parameters) {
var paramOperator = parameter.FilterOperator;
if (paramOperator.Equals(index.FilterOperator)) {
return parameter;
}
}
}
return null;
}
private void Verify(FilterParamIndexBase index, long?testValue, bool[] expected)
{
testBean.LongBoxed = testValue;
index.MatchEvent(testEventBean, matchesList, null);
for (int i = 0; i < expected.Length; i++)
{
Assert.AreEqual(expected[i], testEvaluators[i].GetAndResetCountInvoked() == 1);
}
}
private void VerifyDoubleBoxed(
FilterParamIndexBase index,
double testValue,
int numExpected)
{
testBean.DoubleBoxed = testValue;
index.MatchEvent(testEventBean, matchesList, null);
Assert.AreEqual(numExpected, testEvaluator.GetAndResetCountInvoked());
}
private void VerifyLongPrimitive(
FilterParamIndexBase index,
long testValue,
int numExpected)
{
testBean.LongPrimitive = testValue;
index.MatchEvent(testEventBean, matchesList, null);
Assert.AreEqual(numExpected, testEvaluator.GetAndResetCountInvoked());
}
public void TestCreateIndex()
{
// Create a "greater" index
FilterParamIndexBase index = IndexFactory.CreateIndex(MakeLookupable("IntPrimitive"), lockFactory, FilterOperator.GREATER);
Assert.IsTrue(index != null);
Assert.IsTrue(index is FilterParamIndexCompare);
Assert.IsTrue(GetPropName(index).Equals("IntPrimitive"));
Assert.IsTrue(index.FilterOperator == FilterOperator.GREATER);
// Create an "Equals" index
index = IndexFactory.CreateIndex(MakeLookupable("string"), lockFactory, FilterOperator.EQUAL);
Assert.IsTrue(index != null);
Assert.IsTrue(index is FilterParamIndexEquals);
Assert.IsTrue(GetPropName(index).Equals("string"));
Assert.IsTrue(index.FilterOperator == FilterOperator.EQUAL);
// Create an "not equals" index
index = IndexFactory.CreateIndex(MakeLookupable("string"), lockFactory, FilterOperator.NOT_EQUAL);
Assert.IsTrue(index != null);
Assert.IsTrue(index is FilterParamIndexNotEquals);
Assert.IsTrue(GetPropName(index).Equals("string"));
Assert.IsTrue(index.FilterOperator == FilterOperator.NOT_EQUAL);
// Create a range index
index = IndexFactory.CreateIndex(MakeLookupable("DoubleBoxed"), lockFactory, FilterOperator.RANGE_CLOSED);
Assert.IsTrue(index is FilterParamIndexDoubleRange);
index = IndexFactory.CreateIndex(MakeLookupable("DoubleBoxed"), lockFactory, FilterOperator.NOT_RANGE_CLOSED);
Assert.IsTrue(index is FilterParamIndexDoubleRangeInverted);
// Create a in-index
index = IndexFactory.CreateIndex(MakeLookupable("DoubleBoxed"), lockFactory, FilterOperator.IN_LIST_OF_VALUES);
Assert.IsTrue(index is FilterParamIndexIn);
index = IndexFactory.CreateIndex(MakeLookupable("DoubleBoxed"), lockFactory, FilterOperator.NOT_IN_LIST_OF_VALUES);
Assert.IsTrue(index is FilterParamIndexNotIn);
// Create a boolean-expression-index
index = IndexFactory.CreateIndex(MakeLookupable("boolean"), lockFactory, FilterOperator.BOOLEAN_EXPRESSION);
Assert.IsTrue(index is FilterParamIndexBooleanExpr);
index = IndexFactory.CreateIndex(MakeLookupable("boolean"), lockFactory, FilterOperator.BOOLEAN_EXPRESSION);
Assert.IsTrue(index is FilterParamIndexBooleanExpr);
}
/// <summary>
/// Remove an index, returning true if it was found and removed or false if not in collection.
/// NOTE: the client to this method must use the read-write lock of this object to lock, if
/// required by the client code.
/// </summary>
/// <param name="index">is the index to remove</param>
/// <returns>true if found, false if not existing</returns>
public bool Remove(FilterParamIndexBase index)
{
CheckIndizesIsModifiable();
return(_indizes.Remove(index));
}
/// <summary>
/// Add an index. The same index can be added twice - there is no checking done.
/// NOTE: the client to this method must use the read-write lock of this object
/// to lock, if required by the client code.
/// </summary>
/// <param name="index">index to add</param>
public void Add(FilterParamIndexBase index)
{
CheckIndizesIsModifiable();
_indizes.Add(index);
}
private string GetPropName(FilterParamIndexBase index)
{
FilterParamIndexLookupableBase propIndex = (FilterParamIndexLookupableBase)index;
return(propIndex.Lookupable.Expression);
}
private static bool RemoveFromNode(
FilterHandle filterCallback,
FilterHandleSetNode currentNode,
FilterValueSetParam[] @params,
int currentLevel)
{
// No remaining filter parameters
if (currentLevel == @params.Length) {
using (currentNode.NodeRWLock.WriteLock.Acquire())
{
return currentNode.Remove(filterCallback);
}
}
if (currentLevel > @params.Length) {
Log.Warn(
".removeFromNode (" + Thread.CurrentThread.ManagedThreadId + ") Current level exceed parameter length, node=" + currentNode +
" filterCallback=" + filterCallback);
return false;
}
// Remove from index
using (currentNode.NodeRWLock.WriteLock.Acquire())
{
FilterParamIndexBase indexFound = null;
// find matching index
foreach (var index in currentNode.Indizes)
{
for (var i = 0; i < @params.Length; i++) {
var param = @params[i];
var indexMatch = false;
if (index is FilterParamIndexLookupableBase) {
var baseIndex = (FilterParamIndexLookupableBase) index;
if (param.Lookupable.Expression.Equals(baseIndex.Lookupable.Expression) &&
param.FilterOperator.Equals(baseIndex.FilterOperator)) {
indexMatch = true;
}
}
else if (index is FilterParamIndexBooleanExpr && param.FilterOperator == FilterOperator.BOOLEAN_EXPRESSION) {
indexMatch = true;
}
if (indexMatch) {
bool found = RemoveFromIndex(filterCallback, index, @params, currentLevel + 1, param.FilterForValue);
if (found) {
indexFound = index;
break;
}
}
}
if (indexFound != null)
{
break;
}
}
if (indexFound == null)
{
return false;
}
// Remove the index if the index is now empty
if (indexFound.IsEmpty)
{
var isRemoved = currentNode.Remove(indexFound);
if (!isRemoved)
{
Log.Warn(
".removeFromNode (" + Thread.CurrentThread.ManagedThreadId + ") Could not find the index in index list for removal, index=" +
indexFound + " filterCallback=" + filterCallback);
return true;
}
}
return true;
}
}
private static bool RemoveFromIndex(
FilterHandle filterCallback,
FilterParamIndexBase index,
FilterValueSetParam[] @params,
int currentLevel,
object filterForValue)
{
using (index.ReadWriteLock.WriteLock.Acquire())
{
EventEvaluator eventEvaluator = index.Get(filterForValue);
if (eventEvaluator == null)
{
// This is possible as there can be another path
return false;
}
if (eventEvaluator is FilterHandleSetNode)
{
var node = (FilterHandleSetNode) eventEvaluator;
var found = RemoveFromNode(filterCallback, node, @params, currentLevel);
if (!found)
{
return false;
}
var isEmpty = node.IsEmpty();
if (isEmpty)
{
// Since we are holding a write lock to this index, there should not be a chance that
// another thread had been adding anything to this FilterHandleSetNode
index.Remove(filterForValue);
}
return true;
}
var nextIndex = (FilterParamIndexBase) eventEvaluator;
FilterParamIndexBase indexFound = null;
if (nextIndex is FilterParamIndexLookupableBase)
{
var baseIndex = (FilterParamIndexLookupableBase) nextIndex;
for (var i = 0; i < @params.Length; i++)
{
var param = @params[i];
if (param.Lookupable.Expression.Equals(baseIndex.Lookupable.Expression) &&
param.FilterOperator.Equals(baseIndex.FilterOperator))
{
var found = RemoveFromIndex(filterCallback, baseIndex, @params, currentLevel + 1, param.FilterForValue);
if (found)
{
indexFound = baseIndex;
break;
}
}
}
}
else
{
var booleanIndex = (FilterParamIndexBooleanExpr) nextIndex;
for (var i = 0; i < @params.Length; i++)
{
var param = @params[i];
// if boolean-expression then match only if this is the last parameter,
// all others considered are higher order and sort ahead
if (param.FilterOperator.Equals(FilterOperator.BOOLEAN_EXPRESSION))
{
bool found = booleanIndex.RemoveMayNotExist(param.FilterForValue);
if (found)
{
indexFound = booleanIndex;
break;
}
}
}
}
if (indexFound == null)
{
return false;
}
var indexIsEmpty = nextIndex.IsEmpty;
if (indexIsEmpty)
{
// Since we are holding a write lock to this index, there should not be a chance that
// another thread had been adding anything to this FilterHandleSetNode
index.Remove(filterForValue);
}
return true;
}
}
/// <summary>
/// Add to an index the value to filter for.
/// </summary>
/// <param name="index">is the index to add to</param>
/// <param name="filterForValue">is the filter parameter value to add</param>
/// <param name="remainingParameters">any remaining parameters</param>
/// <param name="filterCallback">the filter callback</param>
/// <param name="lockFactory">the lock factory</param>
private static void AddToIndex(
ArrayDeque<FilterValueSetParam> remainingParameters,
FilterHandle filterCallback,
FilterParamIndexBase index,
object filterForValue,
FilterServiceGranularLockFactory lockFactory)
{
EventEvaluator eventEvaluator;
using (index.ReadWriteLock.ReadLock.Acquire())
{
eventEvaluator = index.Get(filterForValue);
// The filter parameter value already existed in bean, add and release locks
if (eventEvaluator != null) {
var added = AddToEvaluator(remainingParameters, filterCallback, eventEvaluator, lockFactory);
if (added) {
return;
}
}
}
// new filter parameter value, need a write lock
using (index.ReadWriteLock.WriteLock.Acquire())
{
eventEvaluator = index.Get(filterForValue);
// It may exist now since another thread could have added the entry
if (eventEvaluator != null)
{
var added = AddToEvaluator(remainingParameters, filterCallback, eventEvaluator, lockFactory);
if (added)
{
return;
}
// The found eventEvaluator must be converted to a new FilterHandleSetNode
var nextIndexInner = (FilterParamIndexBase) eventEvaluator;
var newNode = new FilterHandleSetNode(lockFactory.ObtainNew());
newNode.Add(nextIndexInner);
index.Remove(filterForValue);
index.Put(filterForValue, newNode);
AddToNode(remainingParameters, filterCallback, newNode, lockFactory);
return;
}
// The index does not currently have this filterCallback value,
// if there are no remaining parameters, create a node
if (remainingParameters.IsEmpty())
{
var node = new FilterHandleSetNode(lockFactory.ObtainNew());
AddToNode(remainingParameters, filterCallback, node, lockFactory);
index.Put(filterForValue, node);
return;
}
// If there are remaining parameters, create a new index for the next parameter
var parameterPickedForIndex = remainingParameters.RemoveFirst();
var nextIndex = IndexFactory.CreateIndex(parameterPickedForIndex.Lookupable, lockFactory, parameterPickedForIndex.FilterOperator);
index.Put(filterForValue, nextIndex);
AddToIndex(remainingParameters, filterCallback, nextIndex, parameterPickedForIndex.FilterForValue, lockFactory);
}
}
