com.datatorrent.contrib.redis.NumberSummation.java Source code

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Here is the source code for com.datatorrent.contrib.redis.NumberSummation.java

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/**
 * 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 com.datatorrent.contrib.redis;

import java.util.HashMap;
import java.util.Map;
import org.apache.commons.lang.mutable.MutableDouble;
import org.apache.commons.lang.mutable.MutableLong;

/**
 * Provides routines of number aggregation. Not to be exported outside of this package
 * @since 0.9.3
 */
class NumberSummation<K, V> {
    private AbstractRedisAggregateOutputOperator<?> operator;
    private Map<Object, Object> dataMap;

    NumberSummation(AbstractRedisAggregateOutputOperator<?> operator, Map<Object, Object> dataMap) {
        this.operator = operator;
        this.dataMap = dataMap;
    }

    protected Number convertToNumber(Object o) {
        if (o == null) {
            return null;
        } else if (o instanceof MutableDouble || o instanceof MutableLong) {
            return (Number) o;
        } else if (o instanceof Double || o instanceof Float) {
            return new MutableDouble((Number) o);
        } else if (o instanceof Number) {
            return new MutableLong((Number) o);
        } else {
            return new MutableDouble(o.toString());
        }
    }

    @SuppressWarnings("unchecked")
    public void storeAggregate() {
        for (Map.Entry<Object, Object> entry : dataMap.entrySet()) {
            Object key = entry.getKey();
            Object value = entry.getValue();
            if (value instanceof Map) {
                for (Map.Entry<Object, Object> entry1 : ((Map<Object, Object>) value).entrySet()) {
                    String field = entry1.getKey().toString();
                    Object hvalue = entry1.getValue();
                    if (hvalue instanceof Number) {
                        operator.getStore().hincrByFloat(key.toString(), field, ((Number) hvalue).doubleValue());
                    } else {
                        operator.getStore().hincrByFloat(key.toString(), field,
                                Double.parseDouble(hvalue.toString()));
                    }
                }
            } else {
                if (value instanceof Number) {
                    operator.getStore().incrByFloat(key.toString(), ((Number) value).doubleValue());
                } else {
                    operator.getStore().incrByFloat(key.toString(), Double.parseDouble(value.toString()));
                }
            }
        }
        dataMap.clear();
    }

    @SuppressWarnings("unchecked")
    public void process(K key, V value) throws RuntimeException {
        if (value instanceof Map) {
            Object o = dataMap.get(key);
            if (o == null) {
                o = new HashMap<Object, Object>();
                dataMap.put(key, o);
            }

            if (!(o instanceof Map)) {
                throw new RuntimeException("Values of unexpected type in data map. Expecting Map");
            }
            Map<Object, Object> map = (Map<Object, Object>) o;
            for (Map.Entry<Object, Object> entry1 : ((Map<Object, Object>) value).entrySet()) {
                Object field = entry1.getKey();
                Number oldVal = (Number) map.get(field);
                if (oldVal == null) {
                    map.put(field, convertToNumber(entry1.getValue()));
                } else if (oldVal instanceof MutableDouble) {
                    ((MutableDouble) oldVal).add(convertToNumber(entry1.getValue()));
                } else if (oldVal instanceof MutableLong) {
                    ((MutableLong) oldVal).add(convertToNumber(entry1.getValue()));
                } else {
                    throw new RuntimeException(
                            "Values of unexpected type in data map value field type. Expecting MutableLong or MutableDouble");
                }
            }
        } else {
            Number oldVal = convertToNumber(dataMap.get(key));
            if (oldVal == null) {
                dataMap.put(key, convertToNumber(value));
            } else {
                if (oldVal instanceof MutableDouble) {
                    ((MutableDouble) oldVal).add(convertToNumber(value));
                } else if (oldVal instanceof MutableLong) {
                    ((MutableLong) oldVal).add(convertToNumber(value));
                } else {
                    // should not get here
                    throw new RuntimeException(
                            "Values of unexpected type in data map value type. Expecting MutableLong or MutableDouble");
                }
            }
        }
    }
}