Example usage for org.apache.cassandra.utils EstimatedHistogram EstimatedHistogram

Introduction

In this page you can find the example usage for org.apache.cassandra.utils EstimatedHistogram EstimatedHistogram.

Prototype

public EstimatedHistogram() 

Source Link

Usage

From source file:c3.ops.priam.resources.CassandraAdmin.java

License:Apache License

@GET
@Path("/cfhistograms")
public Response cfhistograms(@QueryParam(REST_HEADER_KEYSPACES) String keyspace,
        @QueryParam(REST_HEADER_CFS) String cfname)
        throws IOException, ExecutionException, InterruptedException, JSONException {
    JMXNodeTool nodetool = null;/*from ww w .j ava 2s  .c  om*/
    try {
        nodetool = JMXNodeTool.instance(config);
    } catch (JMXConnectionException e) {
        return Response.status(503).entity("JMXConnectionException").build();
    }
    if (StringUtils.isBlank(keyspace) || StringUtils.isBlank(cfname))
        return Response.status(400).entity("Missing keyspace/cfname in request").build();

    ColumnFamilyStoreMBean store = nodetool.getCfsProxy(keyspace, cfname);

    // default is 90 offsets
    long[] offsets = new EstimatedHistogram().getBucketOffsets();

    long[] rrlh = store.getRecentReadLatencyHistogramMicros();
    long[] rwlh = store.getRecentWriteLatencyHistogramMicros();
    long[] sprh = store.getRecentSSTablesPerReadHistogram();
    long[] ersh = store.getEstimatedRowSizeHistogram();
    long[] ecch = store.getEstimatedColumnCountHistogram();

    JSONObject rootObj = new JSONObject();
    JSONArray columns = new JSONArray();
    columns.put("offset");
    columns.put("sstables");
    columns.put("write latency");
    columns.put("read latency");
    columns.put("row size");
    columns.put("column count");
    rootObj.put("columns", columns);
    JSONArray values = new JSONArray();
    for (int i = 0; i < offsets.length; i++) {
        JSONArray row = new JSONArray();
        row.put(offsets[i]);
        row.put(i < sprh.length ? sprh[i] : "");
        row.put(i < rwlh.length ? rwlh[i] : "");
        row.put(i < rrlh.length ? rrlh[i] : "");
        row.put(i < ersh.length ? ersh[i] : "");
        row.put(i < ecch.length ? ecch[i] : "");
        values.put(row);
    }
    rootObj.put("values", values);
    return Response.ok(rootObj, MediaType.APPLICATION_JSON).build();
}

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From source file:com.netflix.priam.resources.CassandraAdminResource.java

License:Apache License

@GET
@Path("/cfhistograms")
public Response cfhistograms(@QueryParam("keyspace") String keyspace, @QueryParam("cfname") String cfname)
        throws Exception {
    JMXNodeTool nodetool = getNodeTool();
    if (StringUtils.isBlank(keyspace) || StringUtils.isBlank(cfname)) {
        return Response.status(400).entity("Missing keyspace/cfname in request").build();
    }// w  ww  . j  a v a2  s . co  m

    // default is 90 offsets
    long[] offsets = new EstimatedHistogram().getBucketOffsets();

    Object readLatency = nodetool.getColumnFamilyMetric(keyspace, cfname, "ReadLatency");
    Object writeLatency = nodetool.getColumnFamilyMetric(keyspace, cfname, "WriteLatency");
    Object ssTablesPerReadHist = nodetool.getColumnFamilyMetric(keyspace, cfname, "SSTablesPerReadHistogram");
    Object estimatedRowSizeHist = nodetool.getColumnFamilyMetric(keyspace, cfname, "EstimatedRowSizeHistogram");
    Object estimatedColumnCountHist = nodetool.getColumnFamilyMetric(keyspace, cfname,
            "EstimatedColumnCountHistogram");

    Map<String, Object> rootObj = Maps.newLinkedHashMap();
    List<String> columns = ImmutableList.of("offset", "sstables", "write latency", "read latency", "row size",
            "column count");
    rootObj.put("columns", columns);
    List<Object> values = Lists.newArrayList();
    for (int i = 0; i < offsets.length; i++) {
        List<Object> row = Lists.newArrayList();
        row.add(offsets[i]);
        row.add(readLatency);
        row.add(writeLatency);
        row.add(ssTablesPerReadHist);
        row.add(estimatedRowSizeHist);
        row.add(estimatedColumnCountHist);
        values.add(row);
    }
    rootObj.put("values", values);
    return Response.ok(rootObj, MediaType.APPLICATION_JSON).build();
}

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From source file:org.wso2.carbon.cassandra.cluster.mgt.query.ClusterMBeanServiceHandler.java

License:Open Source License

public ColumnFamilyHistograms[] getCfHistograms(String keySpace, String columnFamily)
        throws ClusterDataAdminException {
    clusterColumnFamilyMBeanService = ClusterMBeanProxy.getClusterColumnFamilyMBeanService(keySpace,
            columnFamily);/*from w  w  w .  j  a  v  a  2s. c om*/

    // default is 90 offsets
    long[] offsets = new EstimatedHistogram().getBucketOffsets();

    long[] rrlh = clusterColumnFamilyMBeanService.getRecentReadLatencyHistogramMicros();
    long[] rwlh = clusterColumnFamilyMBeanService.getRecentWriteLatencyHistogramMicros();
    long[] sprh = clusterColumnFamilyMBeanService.getRecentSSTablesPerReadHistogram();
    long[] ersh = clusterColumnFamilyMBeanService.getEstimatedRowSizeHistogram();
    long[] ecch = clusterColumnFamilyMBeanService.getEstimatedColumnCountHistogram();
    ColumnFamilyHistograms[] columnFamilyHistograms = new ColumnFamilyHistograms[offsets.length];
    for (int i = 0; i < offsets.length; i++) {
        ColumnFamilyHistograms columnFamilyHistogram = new ColumnFamilyHistograms();
        columnFamilyHistogram.setOffset(offsets[i]);
        if (i < sprh.length)
            columnFamilyHistogram.setSSTables(sprh[i]);
        else
            columnFamilyHistogram.setSSTables(-1);

        if (i < rwlh.length)
            columnFamilyHistogram.setWriteLatency(rwlh[i]);
        else
            columnFamilyHistogram.setWriteLatency(-1);

        if (i < rrlh.length)
            columnFamilyHistogram.setReadLatency(rrlh[i]);
        else
            columnFamilyHistogram.setReadLatency(-1);

        if (i < ersh.length)
            columnFamilyHistogram.setRowSize(ersh[i]);
        else
            columnFamilyHistogram.setRowSize(-1);

        if (i < ecch.length)
            columnFamilyHistogram.setColumnCount(ecch[i]);
        else
            columnFamilyHistogram.setColumnCount(-1);
        columnFamilyHistograms[i] = columnFamilyHistogram;
    }
    return columnFamilyHistograms;
}

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