cmds/statsd/src/parse_util.cpp

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed 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.
 */

#include <parse_util.h>
#include <log/log_event_list.h>

using android::os::statsd::EventMetricData;
using android::os::statsd::KeyId;
using android::os::statsd::KeyId_IsValid;
using android::os::statsd::KeyValuePair;
using android::os::statsd::TagId;
using android::os::statsd::TagId_IsValid;

EventMetricData parse(log_msg msg)
{
    // dump all statsd logs to dropbox for now.
    // TODO: Add filtering, aggregation, etc.
    EventMetricData eventMetricData;
    android_log_context context = create_android_log_parser(const_cast<log_msg*>(&msg)->msg()
                                                            + sizeof(uint32_t),
                                                            const_cast<log_msg*>(&msg)->len()
                                                            - sizeof(uint32_t));
    android_log_list_element elem;

    if (context) {
        memset(&elem, 0, sizeof(elem));
        size_t index = 0;
        int32_t key = -1;
        int32_t tag = -1;

        do {
            elem = android_log_read_next(context);
            switch ((int)elem.type) {
                case EVENT_TYPE_INT:
                    if (index == 0) {
                        tag = elem.data.int32;
                        if (TagId_IsValid(tag)) {
                            eventMetricData.set_tag(static_cast<TagId>(tag));
                        } else {
                            break;
                        }
                    } else if (index % 2 == 1) {
                        key = elem.data.int32;
                    } else if (KeyId_IsValid(key)) {
                        int32_t val = elem.data.int32;
                        KeyValuePair *keyValuePair = eventMetricData.add_key_value_pair();
                        keyValuePair->set_key(static_cast<KeyId>(key));
                        keyValuePair->set_value_int(val);
                    } else {
                    }
                    index++;
                    break;
                case EVENT_TYPE_FLOAT:
                    if (index % 2 == 0 && KeyId_IsValid(key)) {
                        float val = elem.data.float32;
                        KeyValuePair *keyValuePair = eventMetricData.add_key_value_pair();
                        keyValuePair->set_key(static_cast<KeyId>(key));
                        keyValuePair->set_value_float(val);
                    }
                    index++;
                    break;
                case EVENT_TYPE_STRING:
                    if (index % 2 == 0 && KeyId_IsValid(key)) {
                        char* val = elem.data.string;
                        KeyValuePair *keyValuePair = eventMetricData.add_key_value_pair();
                        keyValuePair->set_key(static_cast<KeyId>(key));
                        keyValuePair->set_value_str(val);
                    }
                    index++;
                    break;
                case EVENT_TYPE_LONG:
                    if (index % 2 == 0 && KeyId_IsValid(key)) {
                        int64_t val = elem.data.int64;
                        KeyValuePair *keyValuePair = eventMetricData.add_key_value_pair();
                        keyValuePair->set_key(static_cast<KeyId>(key));
                        keyValuePair->set_value_int(val);
                    }
                    index++;
                    break;
                case EVENT_TYPE_LIST:
                    break;
                case EVENT_TYPE_LIST_STOP:
                    break;
                case EVENT_TYPE_UNKNOWN:
                    break;
                default:
                    elem.complete = true;
                    break;
            }

            if (elem.complete) {
                break;
            }
        } while ((elem.type != EVENT_TYPE_UNKNOWN) && !elem.complete);

        android_log_destroy(&context);
    }

    return eventMetricData;
}