| /* |
| * 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. |
| * |
| */ |
| |
| parser grammar OALParser; |
| |
| @Header {package org.apache.skywalking.oal.tool.grammar;} |
| |
| options { tokenVocab=OALLexer; } |
| |
| |
| // Top Level Description |
| |
| root |
| : (aggregationStatement)* |
| ; |
| |
| aggregationStatement |
| : variable (SPACE)? EQUAL (SPACE)? metricStatement DelimitedComment? LineComment? (SEMI|EOF) |
| ; |
| |
| metricStatement |
| : FROM LR_BRACKET source DOT sourceAttribute RR_BRACKET (filterStatement+)? DOT aggregateFunction |
| ; |
| |
| filterStatement |
| : DOT FILTER LR_BRACKET filterExpression RR_BRACKET |
| ; |
| |
| filterExpression |
| : expression |
| ; |
| |
| source |
| : SRC_ALL | SRC_SERVICE | SRC_SERVICE_INSTANCE | SRC_ENDPOINT | |
| SRC_SERVICE_RELATION | SRC_SERVICE_INSTANCE_RELATION | SRC_ENDPOINT_RELATION | |
| SRC_SERVICE_INSTANCE_JVM_CPU | SRC_SERVICE_INSTANCE_JVM_MEMORY | SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL | SRC_SERVICE_INSTANCE_JVM_GC// JVM source of service instance |
| ; |
| |
| sourceAttribute |
| : IDENTIFIER | ALL |
| ; |
| |
| variable |
| : IDENTIFIER |
| ; |
| |
| aggregateFunction |
| : functionName LR_BRACKET (funcParamExpression | literalExpression)? RR_BRACKET |
| ; |
| |
| functionName |
| : IDENTIFIER |
| ; |
| |
| funcParamExpression |
| : expression |
| ; |
| |
| literalExpression |
| : BOOL_LITERAL | INT_LITERAL |
| ; |
| |
| expression |
| : booleanMatch | stringMatch |
| ; |
| |
| booleanMatch |
| : conditionAttribute DUALEQUALS booleanConditionValue |
| ; |
| |
| stringMatch |
| : conditionAttribute DUALEQUALS (stringConditionValue | enumConditionValue) |
| ; |
| |
| conditionAttribute |
| : IDENTIFIER |
| ; |
| |
| booleanConditionValue |
| : BOOL_LITERAL |
| ; |
| |
| stringConditionValue |
| : STRING_LITERAL |
| ; |
| |
| enumConditionValue |
| : IDENTIFIER DOT IDENTIFIER |
| ; |