Examples of org.apache.accumulo.core.client.ClientSideIteratorScanner

org.apache.accumulo.core.client.ClientSideIteratorScanner
A scanner that instantiates iterators on the client side instead of on the tablet server. This can be useful for testing iterators or in cases where you don't want iterators affecting the performance of tablet servers.

Suggested usage:
Scanner scanner = new ClientSideIteratorScanner(connector.createScanner(tableName, authorizations));

Iterators added to this scanner will be run in the client JVM. Separate scan iterators can be run on the server side and client side by adding iterators to the source scanner (which will execute server side) and to the client side scanner (which will execute client side).

          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupIterators(iterators, scanner);
      } catch (Exception e) {
        throw new IOException(e);
      }

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          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupIterators(iterators, scanner);
      } catch (Exception e) {
        throw new IOException(e);
      }

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          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupMaxVersions(scanner, maxVersions);
        if (rowRegex != null || colfRegex != null || colqRegex != null || valueRegex != null) {
          IteratorSetting is = new IteratorSetting(50, RegExFilter.class);
          RegExFilter.setRegexs(is, rowRegex, colfRegex, colqRegex, valueRegex, false);

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          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators(job)) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupIterators(job, scanner);
      } catch (Exception e) {
        throw new IOException(e);
      }

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          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators(attempt)) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupIterators(attempt, scanner);
      } catch (Exception e) {
        throw new IOException(e);
      }

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          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators(conf)) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupMaxVersions(conf, scanner);
        if (conf.get(ROW_REGEX) != null || conf.get(COLUMN_FAMILY_REGEX) != null || conf.get(COLUMN_QUALIFIER_REGEX) != null ||
            conf.get(VALUE_REGEX) != null) {
          IteratorSetting is = new IteratorSetting(50, RegExFilter.class);

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          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators(conf)) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupMaxVersions(conf, scanner);
        IteratorSetting is = new IteratorSetting(50, RegExFilter.class);
        RegExFilter.setRegexs(is, conf.get(ROW_REGEX), conf.get(COLUMN_FAMILY_REGEX), conf.get(COLUMN_QUALIFIER_REGEX), null, false);
        scanner.addScanIterator(is);

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          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupIterators(iterators, scanner);
      } catch (Exception e) {
        throw new IOException(e);
      }

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          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupIterators(iterators, scanner);
      } catch (Exception e) {
        throw new IOException(e);
      }

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          log.info("Creating isolated scanner");
          scanner = new IsolatedScanner(scanner);
        }
        if (usesLocalIterators) {
          log.info("Using local iterators");
          scanner = new ClientSideIteratorScanner(scanner);
        }
        setupIterators(job, scanner, split.getTableName(), split);
      } catch (Exception e) {
        throw new IOException(e);
      }

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