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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
/*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information regarding
* copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License. You may obtain a
* copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package org.apache.geode.cache.query.internal.index;
// import org.apache.geode.cache.Region;
import org.apache.geode.cache.query.FunctionDomainException;
import org.apache.geode.internal.i18n.LocalizedStrings;
import org.apache.geode.cache.query.AmbiguousNameException;
import org.apache.geode.cache.query.Index;
import org.apache.geode.cache.query.NameResolutionException;
import org.apache.geode.cache.query.QueryException;
import org.apache.geode.cache.query.QueryInvocationTargetException;
import org.apache.geode.cache.query.SelectResults;
import org.apache.geode.cache.query.TypeMismatchException;
import org.apache.geode.cache.query.internal.CompiledValue;
import org.apache.geode.cache.query.internal.ExecutionContext;
import org.apache.geode.cache.query.internal.RuntimeIterator;
import org.apache.geode.cache.query.types.ObjectType;
import org.apache.geode.internal.cache.RegionEntry;
import java.util.*;
public interface IndexProtocol extends Index {
/**
* Constants that indicate three situations where we are removing a mapping. Some implementations
* of index handle some of the cases and not others.
*/
static final int OTHER_OP = 0; // not an UPDATE but some other operation
static final int BEFORE_UPDATE_OP = 1; // handled when there is no reverse map
static final int AFTER_UPDATE_OP = 2; // handled when there is a reverse map
boolean addIndexMapping(RegionEntry entry) throws IMQException;
boolean addAllIndexMappings(Collection c) throws IMQException;
/**
* @param opCode one of OTHER_OP, BEFORE_UPDATE_OP, AFTER_UPDATE_OP.
*/
boolean removeIndexMapping(RegionEntry entry, int opCode) throws IMQException;
boolean removeAllIndexMappings(Collection c) throws IMQException;
boolean clear() throws QueryException;
/**
* This method gets invoked only if the where clause contains multiple 'NOT EQUAL' conditions only
* , for a given index expression ( i.e something like a != 5 and a != 7 ). This will be invoked
* only from RangeJunction.NotEqualConditionEvaluator
*
* @param results The Collection object used for fetching the index results
* @param keysToRemove Set containing Index key which should not be included in the results being
* fetched
* @param context ExecutionContext object
* @throws TypeMismatchException
*/
void query(Collection results, Set keysToRemove, ExecutionContext context)
throws TypeMismatchException, FunctionDomainException, NameResolutionException,
QueryInvocationTargetException;
/**
* This can be invoked only from RangeJunction.SingleCondnEvaluator
*
* @param key Index Key Object for which the Index results need to be fetched
* @param operator Integer specifying the criteria relative to the key , which defines the index
* resultset
* @param results The Collection object used for fetching the index results
* @param keysToRemove Set containing the index keys whose Index results should not included in
* the index results being fetched. In case of 'NOT EQUAL' operator, the key as well as the
* keysToRemove Set ( if it is not null & not empty) containing 'NOT EQUAL' keys mean that
* both should not be present in the index results being fetched ( Fetched results should
* not contain index results corresponding to key + keys of keysToRemove set )
* @param context ExecutionContext object
* @throws TypeMismatchException
*/
void query(Object key, int operator, Collection results, Set keysToRemove,
ExecutionContext context) throws TypeMismatchException, FunctionDomainException,
NameResolutionException, QueryInvocationTargetException;
/**
*
* @param key Index Key Object for which the Index results need to be fetched
* @param operator Integer specifying the criteria relative to the key , which defines the index
* resultset
* @param results The Collection object used for fetching the index results
* @param context ExecutionContext object
* @throws TypeMismatchException
*/
void query(Object key, int operator, Collection results, ExecutionContext context)
throws TypeMismatchException, FunctionDomainException, NameResolutionException,
QueryInvocationTargetException;
/**
*
* @param key
* @param operator
* @param results
* @param iterOp
* @param indpndntItr
* @param context
* @throws TypeMismatchException
* @throws QueryInvocationTargetException
* @throws NameResolutionException
* @throws FunctionDomainException
*/
void query(Object key, int operator, Collection results, CompiledValue iterOp,
RuntimeIterator indpndntItr, ExecutionContext context, List projAttrib,
SelectResults intermediateResults, boolean isIntersection) throws TypeMismatchException,
FunctionDomainException, NameResolutionException, QueryInvocationTargetException;
/**
* This will be queried from RangeJunction.DoubleCondnRangeJunctionEvaluator
*
* @param lowerBoundKey Object representing the lower Bound Key
* @param lowerBoundOperator integer identifying the lower bound ( > or >= )
* @param upperBoundKey Object representing the Upper Bound Key
* @param upperBoundOperator integer identifying the upper bound ( < or <= )
* @param results The Collection object used for fetching the index results
* @param keysToRemove Set containing Index key which should not be included in the results being
* fetched
* @param context ExecutionContext object
* @throws TypeMismatchException
*/
void query(Object lowerBoundKey, int lowerBoundOperator, Object upperBoundKey,
int upperBoundOperator, Collection results, Set keysToRemove, ExecutionContext context)
throws TypeMismatchException, FunctionDomainException, NameResolutionException,
QueryInvocationTargetException;
/**
* Asif: Gets the data for an equi join condition across the region. The function iterates over
* this Range Index's keys & also runs an inner iteration for the Range Index passed as parameter.
* If the two keys match the resultant data of both the indexes is collected.
*
* @param index RangeIndex object for the other operand
* @param context TODO
* @return A List object whose elements are a two dimensional Object Array. Each element of the
* List represents a value (key of Range Index) which satisfies the equi join condition.
* The Object array will have two rows. Each row ( one dimensional Object Array ) will
* contain objects or type Struct or Object.
* @throws TypeMismatchException
* @throws QueryInvocationTargetException
* @throws NameResolutionException
* @throws FunctionDomainException
*/
List queryEquijoinCondition(IndexProtocol index, ExecutionContext context)
throws TypeMismatchException, FunctionDomainException, NameResolutionException,
QueryInvocationTargetException;
boolean isValid();
void markValid(boolean b);
void initializeIndex(boolean loadEntries) throws IMQException;
void destroy();
boolean containsEntry(RegionEntry entry);
/**
* Asif : This function returns the canonicalized definitions of the from clauses used in Index
* creation
*
* @return String array containing canonicalized definitions
*/
public String[] getCanonicalizedIteratorDefinitions();
/**
* Asif: Object type of the data ( tuple ) contained in the Index Results . It will be either of
* type ObjectType or StructType
*
* @return ObjectType
*/
public ObjectType getResultSetType();
public int getSizeEstimate(Object key, int op, int matchLevel) throws TypeMismatchException;
public boolean isMatchingWithIndexExpression(CompiledValue condnExpr, String condnExprStr,
ExecutionContext context)
throws AmbiguousNameException, TypeMismatchException, NameResolutionException;
}