| /* |
| * 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.calcite.adapter.os; |
| |
| import org.apache.calcite.DataContext; |
| import org.apache.calcite.linq4j.Enumerable; |
| import org.apache.calcite.rel.type.RelDataType; |
| import org.apache.calcite.rel.type.RelDataTypeFactory; |
| import org.apache.calcite.schema.ScannableTable; |
| import org.apache.calcite.sql.type.SqlTypeName; |
| |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| |
| /** |
| * Table function that executes the OS "jps" ("Java Virtual Machine Process |
| * Status Tool") command to list all java processes of a user. |
| */ |
| public class JpsTableFunction { |
| private JpsTableFunction() { |
| } |
| |
| public static ScannableTable eval(boolean b) { |
| return new AbstractBaseScannableTable() { |
| @Override public Enumerable<@Nullable Object[]> scan(DataContext root) { |
| return Processes.processLines("jps", "-mlvV") |
| .select(a0 -> { |
| final String[] fields = a0.split(" "); |
| return new Object[]{Long.valueOf(fields[0]), fields[1]}; |
| }); |
| } |
| |
| @Override public RelDataType getRowType(RelDataTypeFactory typeFactory) { |
| return typeFactory.builder() |
| .add("pid", SqlTypeName.BIGINT) |
| .add("info", SqlTypeName.VARCHAR) |
| .build(); |
| } |
| }; |
| } |
| } |