Examples with ConsolFun org.rrd4j.ConsolFun used on opensource projects

Example 1 with ConsolFun

use of org.rrd4j.ConsolFun in project openhab1-addons by openhab.

the class RRD4jService method store.

/**
     * @{inheritDoc}
     */
@Override
public synchronized void store(final Item item, final String alias) {
    final String name = alias == null ? item.getName() : alias;
    RrdDb db = getDB(name);
    if (db != null) {
        ConsolFun function = getConsolidationFunction(db);
        long now = System.currentTimeMillis() / 1000;
        if (function != ConsolFun.AVERAGE) {
            try {
                // happens right at this spot
                if (now - 1 > db.getLastUpdateTime()) {
                    // only do it if there is not already a value
                    double lastValue = db.getLastDatasourceValue(DATASOURCE_STATE);
                    if (!Double.isNaN(lastValue)) {
                        Sample sample = db.createSample();
                        sample.setTime(now - 1);
                        sample.setValue(DATASOURCE_STATE, lastValue);
                        sample.update();
                        logger.debug("Stored '{}' with state '{}' in rrd4j database (again)", name, mapToState(lastValue, item.getName()));
                    }
                }
            } catch (IOException e) {
                logger.debug("Error storing last value (again): {}", e.getMessage());
            }
        }
        try {
            Sample sample = db.createSample();
            sample.setTime(now);
            DecimalType state = (DecimalType) item.getStateAs(DecimalType.class);
            if (state != null) {
                double value = state.toBigDecimal().doubleValue();
                if (db.getDatasource(DATASOURCE_STATE).getType() == DsType.COUNTER) {
                    // counter
                    // values
                    // must
                    // be
                    // adjusted
                    // by
                    // stepsize
                    value = value * db.getRrdDef().getStep();
                }
                sample.setValue(DATASOURCE_STATE, value);
                sample.update();
                logger.debug("Stored '{}' with state '{}' in rrd4j database", name, state);
            }
        } catch (IllegalArgumentException e) {
            if (e.getMessage().contains("at least one second step is required")) {
                // we try to store the value one second later
                Runnable task = new Runnable() {

                    @Override
                    public void run() {
                        store(item, name);
                    }
                };
                ScheduledFuture<?> job = scheduledJobs.get(name);
                if (job != null) {
                    job.cancel(true);
                    scheduledJobs.remove(name);
                }
                job = scheduler.schedule(task, 1, TimeUnit.SECONDS);
                scheduledJobs.put(name, job);
            } else {
                logger.warn("Could not persist '{}' to rrd4j database: {}", name, e.getMessage());
            }
        } catch (Exception e) {
            logger.warn("Could not persist '{}' to rrd4j database: {}", name, e.getMessage());
        }
        try {
            db.close();
        } catch (IOException e) {
            logger.debug("Error closing rrd4j database: {}", e.getMessage());
        }
    }
}

Example 2 with ConsolFun

use of org.rrd4j.ConsolFun in project openhab1-addons by openhab.

the class RRD4jChartServlet method addLine.

/**
     * Adds a line for the item to the graph definition.
     * The color of the line is determined by the counter, it simply picks the according index from LINECOLORS (and
     * rolls over if necessary).
     * 
     * @param graphDef the graph definition to fill
     * @param item the item to add a line for
     * @param counter defines the number of the datasource and is used to determine the line color
     */
protected void addLine(RrdGraphDef graphDef, Item item, int counter) {
    Color color = LINECOLORS[counter % LINECOLORS.length];
    String label = itemUIRegistry.getLabel(item.getName());
    String rrdName = RRD4jService.DB_FOLDER + File.separator + item.getName() + ".rrd";
    ConsolFun consolFun;
    if (label != null && label.contains("[") && label.contains("]")) {
        label = label.substring(0, label.indexOf('['));
    }
    try {
        RrdDb db = new RrdDb(rrdName);
        consolFun = db.getRrdDef().getArcDefs()[0].getConsolFun();
        db.close();
    } catch (IOException e) {
        consolFun = ConsolFun.MAX;
    }
    if (item instanceof NumberItem) {
        // we only draw a line
        // RRD4jService.getConsolidationFunction(item));
        graphDef.datasource(Integer.toString(counter), rrdName, "state", consolFun);
        graphDef.line(Integer.toString(counter), color, label, 2);
    } else {
        // we draw a line and fill the area beneath it with a transparent color
        // RRD4jService.getConsolidationFunction(item));
        graphDef.datasource(Integer.toString(counter), rrdName, "state", consolFun);
        Color areaColor = AREACOLORS[counter % LINECOLORS.length];
        graphDef.area(Integer.toString(counter), areaColor);
        graphDef.line(Integer.toString(counter), color, label, 2);
    }
}

Example 3 with ConsolFun

use of org.rrd4j.ConsolFun in project openhab1-addons by openhab.

the class RRD4jService method query.

@Override
public Iterable<HistoricItem> query(FilterCriteria filter) {
    String itemName = filter.getItemName();
    RrdDb db = getDB(itemName);
    if (db != null) {
        ConsolFun consolidationFunction = getConsolidationFunction(db);
        long start = 0L;
        long end = filter.getEndDate() == null ? System.currentTimeMillis() / 1000 : filter.getEndDate().getTime() / 1000;
        try {
            if (filter.getBeginDate() == null) {
                // want to support
                if (filter.getOrdering() == Ordering.DESCENDING && filter.getPageSize() == 1 && filter.getPageNumber() == 0) {
                    if (filter.getEndDate() == null) {
                        // we are asked only for the most recent value!
                        double lastValue = db.getLastDatasourceValue(DATASOURCE_STATE);
                        if (!Double.isNaN(lastValue)) {
                            HistoricItem rrd4jItem = new RRD4jItem(itemName, mapToState(lastValue, itemName), new Date(db.getLastArchiveUpdateTime() * 1000));
                            return Collections.singletonList(rrd4jItem);
                        } else {
                            return Collections.emptyList();
                        }
                    } else {
                        start = end;
                    }
                } else {
                    throw new UnsupportedOperationException("rrd4j does not allow querys without a begin date, " + "unless order is descending and a single value is requested");
                }
            } else {
                start = filter.getBeginDate().getTime() / 1000;
            }
            FetchRequest request = db.createFetchRequest(consolidationFunction, start, end, 1);
            List<HistoricItem> items = new ArrayList<HistoricItem>();
            FetchData result = request.fetchData();
            long ts = result.getFirstTimestamp();
            long step = result.getRowCount() > 1 ? result.getStep() : 0;
            for (double value : result.getValues(DATASOURCE_STATE)) {
                if (!Double.isNaN(value) && (((ts >= start) && (ts <= end)) || (start == end))) {
                    RRD4jItem rrd4jItem = new RRD4jItem(itemName, mapToState(value, itemName), new Date(ts * 1000));
                    items.add(rrd4jItem);
                }
                ts += step;
            }
            return items;
        } catch (IOException e) {
            logger.warn("Could not query rrd4j database for item '{}': {}", itemName, e.getMessage());
        }
    }
    return Collections.emptyList();
}