Examples with JsonGenerator com.fasterxml.jackson.core.JsonGenerator used on opensource projects

Example 31 with JsonGenerator

use of com.fasterxml.jackson.core.JsonGenerator in project hadoop by apache.

the class JMXJsonServlet method doGet.

/**
   * Process a GET request for the specified resource.
   * 
   * @param request
   *          The servlet request we are processing
   * @param response
   *          The servlet response we are creating
   */
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) {
    try {
        // If user is a static user and auth Type is null, that means
        // there is a non-security environment and no need authorization,
        // otherwise, do the authorization.
        final ServletContext servletContext = getServletContext();
        if (!HttpServer2.isStaticUserAndNoneAuthType(servletContext, request) && !isInstrumentationAccessAllowed(request, response)) {
            return;
        }
        JsonGenerator jg = null;
        PrintWriter writer = null;
        try {
            writer = response.getWriter();
            response.setContentType("application/json; charset=utf8");
            response.setHeader(ACCESS_CONTROL_ALLOW_METHODS, "GET");
            response.setHeader(ACCESS_CONTROL_ALLOW_ORIGIN, "*");
            jg = jsonFactory.createGenerator(writer);
            jg.disable(JsonGenerator.Feature.AUTO_CLOSE_TARGET);
            jg.useDefaultPrettyPrinter();
            jg.writeStartObject();
            // query per mbean attribute
            String getmethod = request.getParameter("get");
            if (getmethod != null) {
                String[] splitStrings = getmethod.split("\\:\\:");
                if (splitStrings.length != 2) {
                    jg.writeStringField("result", "ERROR");
                    jg.writeStringField("message", "query format is not as expected.");
                    jg.flush();
                    response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
                    return;
                }
                listBeans(jg, new ObjectName(splitStrings[0]), splitStrings[1], response);
                return;
            }
            // query per mbean
            String qry = request.getParameter("qry");
            if (qry == null) {
                qry = "*:*";
            }
            listBeans(jg, new ObjectName(qry), null, response);
        } finally {
            if (jg != null) {
                jg.close();
            }
            if (writer != null) {
                writer.close();
            }
        }
    } catch (IOException e) {
        LOG.error("Caught an exception while processing JMX request", e);
        response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
    } catch (MalformedObjectNameException e) {
        LOG.error("Caught an exception while processing JMX request", e);
        response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
    }
}

Example 32 with JsonGenerator

use of com.fasterxml.jackson.core.JsonGenerator in project flink by apache.

the class JsonMapper method getOptimizerPropertiesJson.

public static String getOptimizerPropertiesJson(JsonFactory jsonFactory, PlanNode node) {
    try {
        final StringWriter writer = new StringWriter(256);
        final JsonGenerator gen = jsonFactory.createGenerator(writer);
        final OptimizerNode optNode = node.getOptimizerNode();
        gen.writeStartObject();
        // global properties
        if (node.getGlobalProperties() != null) {
            GlobalProperties gp = node.getGlobalProperties();
            gen.writeArrayFieldStart("global_properties");
            addProperty(gen, "Partitioning", gp.getPartitioning().name());
            if (gp.getPartitioningFields() != null) {
                addProperty(gen, "Partitioned on", gp.getPartitioningFields().toString());
            }
            if (gp.getPartitioningOrdering() != null) {
                addProperty(gen, "Partitioning Order", gp.getPartitioningOrdering().toString());
            } else {
                addProperty(gen, "Partitioning Order", "(none)");
            }
            if (optNode.getUniqueFields() == null || optNode.getUniqueFields().size() == 0) {
                addProperty(gen, "Uniqueness", "not unique");
            } else {
                addProperty(gen, "Uniqueness", optNode.getUniqueFields().toString());
            }
            gen.writeEndArray();
        }
        // local properties
        if (node.getLocalProperties() != null) {
            LocalProperties lp = node.getLocalProperties();
            gen.writeArrayFieldStart("local_properties");
            if (lp.getOrdering() != null) {
                addProperty(gen, "Order", lp.getOrdering().toString());
            } else {
                addProperty(gen, "Order", "(none)");
            }
            if (lp.getGroupedFields() != null && lp.getGroupedFields().size() > 0) {
                addProperty(gen, "Grouped on", lp.getGroupedFields().toString());
            } else {
                addProperty(gen, "Grouping", "not grouped");
            }
            if (optNode.getUniqueFields() == null || optNode.getUniqueFields().size() == 0) {
                addProperty(gen, "Uniqueness", "not unique");
            } else {
                addProperty(gen, "Uniqueness", optNode.getUniqueFields().toString());
            }
            gen.writeEndArray();
        }
        // output size estimates
        {
            gen.writeArrayFieldStart("estimates");
            addProperty(gen, "Est. Output Size", optNode.getEstimatedOutputSize() == -1 ? "(unknown)" : formatNumber(optNode.getEstimatedOutputSize(), "B"));
            addProperty(gen, "Est. Cardinality", optNode.getEstimatedNumRecords() == -1 ? "(unknown)" : formatNumber(optNode.getEstimatedNumRecords()));
            gen.writeEndArray();
        }
        // output node cost
        if (node.getNodeCosts() != null) {
            gen.writeArrayFieldStart("costs");
            addProperty(gen, "Network", node.getNodeCosts().getNetworkCost() == -1 ? "(unknown)" : formatNumber(node.getNodeCosts().getNetworkCost(), "B"));
            addProperty(gen, "Disk I/O", node.getNodeCosts().getDiskCost() == -1 ? "(unknown)" : formatNumber(node.getNodeCosts().getDiskCost(), "B"));
            addProperty(gen, "CPU", node.getNodeCosts().getCpuCost() == -1 ? "(unknown)" : formatNumber(node.getNodeCosts().getCpuCost(), ""));
            addProperty(gen, "Cumulative Network", node.getCumulativeCosts().getNetworkCost() == -1 ? "(unknown)" : formatNumber(node.getCumulativeCosts().getNetworkCost(), "B"));
            addProperty(gen, "Cumulative Disk I/O", node.getCumulativeCosts().getDiskCost() == -1 ? "(unknown)" : formatNumber(node.getCumulativeCosts().getDiskCost(), "B"));
            addProperty(gen, "Cumulative CPU", node.getCumulativeCosts().getCpuCost() == -1 ? "(unknown)" : formatNumber(node.getCumulativeCosts().getCpuCost(), ""));
            gen.writeEndArray();
        }
        // compiler hints
        if (optNode.getOperator().getCompilerHints() != null) {
            CompilerHints hints = optNode.getOperator().getCompilerHints();
            CompilerHints defaults = new CompilerHints();
            String size = hints.getOutputSize() == defaults.getOutputSize() ? "(none)" : String.valueOf(hints.getOutputSize());
            String card = hints.getOutputCardinality() == defaults.getOutputCardinality() ? "(none)" : String.valueOf(hints.getOutputCardinality());
            String width = hints.getAvgOutputRecordSize() == defaults.getAvgOutputRecordSize() ? "(none)" : String.valueOf(hints.getAvgOutputRecordSize());
            String filter = hints.getFilterFactor() == defaults.getFilterFactor() ? "(none)" : String.valueOf(hints.getFilterFactor());
            gen.writeArrayFieldStart("compiler_hints");
            addProperty(gen, "Output Size (bytes)", size);
            addProperty(gen, "Output Cardinality", card);
            addProperty(gen, "Avg. Output Record Size (bytes)", width);
            addProperty(gen, "Filter Factor", filter);
            gen.writeEndArray();
        }
        gen.writeEndObject();
        gen.close();
        return writer.toString();
    } catch (Exception e) {
        return "{}";
    }
}

Example 33 with JsonGenerator

use of com.fasterxml.jackson.core.JsonGenerator in project flink by apache.

the class AbstractMetricsHandler method getMetricsValues.

private String getMetricsValues(Map<String, String> pathParams, String requestedMetricsList) throws IOException {
    if (requestedMetricsList.isEmpty()) {
        /**
			 * The WebInterface doesn't check whether the list of available metrics was empty. This can lead to a 
			 * request for which the "get" parameter is an empty string.
			 */
        return "";
    }
    MetricStore metricStore = fetcher.getMetricStore();
    synchronized (metricStore) {
        Map<String, String> metrics = getMapFor(pathParams, metricStore);
        if (metrics == null) {
            return "";
        }
        String[] requestedMetrics = requestedMetricsList.split(",");
        StringWriter writer = new StringWriter();
        JsonGenerator gen = JsonFactory.jacksonFactory.createGenerator(writer);
        gen.writeStartArray();
        for (String requestedMetric : requestedMetrics) {
            Object metricValue = metrics.get(requestedMetric);
            if (metricValue != null) {
                gen.writeStartObject();
                gen.writeStringField("id", requestedMetric);
                gen.writeStringField("value", metricValue.toString());
                gen.writeEndObject();
            }
        }
        gen.writeEndArray();
        gen.close();
        return writer.toString();
    }
}

Example 34 with JsonGenerator

use of com.fasterxml.jackson.core.JsonGenerator in project flink by apache.

the class JarListHandler method handleJsonRequest.

@Override
public String handleJsonRequest(Map<String, String> pathParams, Map<String, String> queryParams, ActorGateway jobManager) throws Exception {
    try {
        StringWriter writer = new StringWriter();
        JsonGenerator gen = JsonFactory.jacksonFactory.createGenerator(writer);
        gen.writeStartObject();
        gen.writeStringField("address", queryParams.get(RuntimeMonitorHandler.WEB_MONITOR_ADDRESS_KEY));
        gen.writeArrayFieldStart("files");
        File[] list = jarDir.listFiles(new FilenameFilter() {

            @Override
            public boolean accept(File dir, String name) {
                return name.endsWith(".jar");
            }
        });
        for (File f : list) {
            // separate the uuid and the name parts.
            String id = f.getName();
            int startIndex = id.indexOf("_");
            if (startIndex < 0) {
                continue;
            }
            String name = id.substring(startIndex + 1);
            if (name.length() < 5 || !name.endsWith(".jar")) {
                continue;
            }
            gen.writeStartObject();
            gen.writeStringField("id", id);
            gen.writeStringField("name", name);
            gen.writeNumberField("uploaded", f.lastModified());
            gen.writeArrayFieldStart("entry");
            String[] classes = new String[0];
            try {
                JarFile jar = new JarFile(f);
                Manifest manifest = jar.getManifest();
                String assemblerClass = null;
                if (manifest != null) {
                    assemblerClass = manifest.getMainAttributes().getValue(PackagedProgram.MANIFEST_ATTRIBUTE_ASSEMBLER_CLASS);
                    if (assemblerClass == null) {
                        assemblerClass = manifest.getMainAttributes().getValue(PackagedProgram.MANIFEST_ATTRIBUTE_MAIN_CLASS);
                    }
                }
                if (assemblerClass != null) {
                    classes = assemblerClass.split(",");
                }
            } catch (IOException ignored) {
            // we simply show no entries here
            }
            // show every entry class that can be loaded later on.
            for (String clazz : classes) {
                clazz = clazz.trim();
                PackagedProgram program = null;
                try {
                    program = new PackagedProgram(f, clazz, new String[0]);
                } catch (Exception ignored) {
                // ignore jar files which throw an error upon creating a PackagedProgram
                }
                if (program != null) {
                    gen.writeStartObject();
                    gen.writeStringField("name", clazz);
                    String desc = program.getDescription();
                    gen.writeStringField("description", desc == null ? "No description provided" : desc);
                    gen.writeEndObject();
                }
            }
            gen.writeEndArray();
            gen.writeEndObject();
        }
        gen.writeEndArray();
        gen.writeEndObject();
        gen.close();
        return writer.toString();
    } catch (Exception e) {
        throw new RuntimeException("Failed to fetch jar list: " + e.getMessage(), e);
    }
}

Example 35 with JsonGenerator

use of com.fasterxml.jackson.core.JsonGenerator in project flink by apache.

the class JarPlanHandler method handleJsonRequest.

@Override
public String handleJsonRequest(Map<String, String> pathParams, Map<String, String> queryParams, ActorGateway jobManager) throws Exception {
    try {
        JarActionHandlerConfig config = JarActionHandlerConfig.fromParams(pathParams, queryParams);
        JobGraph graph = getJobGraphAndClassLoader(config).f0;
        StringWriter writer = new StringWriter();
        JsonGenerator gen = JsonFactory.jacksonFactory.createGenerator(writer);
        gen.writeStartObject();
        gen.writeFieldName("plan");
        gen.writeRawValue(JsonPlanGenerator.generatePlan(graph));
        gen.writeEndObject();
        gen.close();
        return writer.toString();
    } catch (Exception e) {
        return sendError(e);
    }
}