Examples with UntypedResultSet org.apache.cassandra.cql3.UntypedResultSet used on opensource projects

Example 41 with UntypedResultSet

use of org.apache.cassandra.cql3.UntypedResultSet in project cassandra by apache.

the class SystemKeyspace method loadPaxosState.

public static PaxosState loadPaxosState(DecoratedKey key, TableMetadata metadata, int nowInSec) {
    String req = "SELECT * FROM system.%s WHERE row_key = ? AND cf_id = ?";
    UntypedResultSet results = QueryProcessor.executeInternalWithNow(nowInSec, System.nanoTime(), format(req, PAXOS), key.getKey(), metadata.id.asUUID());
    if (results.isEmpty())
        return new PaxosState(key, metadata);
    UntypedResultSet.Row row = results.one();
    Commit promised = row.has("in_progress_ballot") ? new Commit(row.getUUID("in_progress_ballot"), new PartitionUpdate(metadata, key, metadata.regularAndStaticColumns(), 1)) : Commit.emptyCommit(key, metadata);
    // either we have both a recently accepted ballot and update or we have neither
    Commit accepted = row.has("proposal_version") && row.has("proposal") ? new Commit(row.getUUID("proposal_ballot"), PartitionUpdate.fromBytes(row.getBytes("proposal"), row.getInt("proposal_version"))) : Commit.emptyCommit(key, metadata);
    // either most_recent_commit and most_recent_commit_at will both be set, or neither
    Commit mostRecent = row.has("most_recent_commit_version") && row.has("most_recent_commit") ? new Commit(row.getUUID("most_recent_commit_at"), PartitionUpdate.fromBytes(row.getBytes("most_recent_commit"), row.getInt("most_recent_commit_version"))) : Commit.emptyCommit(key, metadata);
    return new PaxosState(promised, accepted, mostRecent);
}

Example 42 with UntypedResultSet

use of org.apache.cassandra.cql3.UntypedResultSet in project cassandra by apache.

the class SystemKeyspace method getSavedTokens.

public static Collection<Token> getSavedTokens() {
    String req = "SELECT tokens FROM system.%s WHERE key='%s'";
    UntypedResultSet result = executeInternal(format(req, LOCAL, LOCAL));
    return result.isEmpty() || !result.one().has("tokens") ? Collections.<Token>emptyList() : deserializeTokens(result.one().getSet("tokens", UTF8Type.instance));
}

Example 43 with UntypedResultSet

use of org.apache.cassandra.cql3.UntypedResultSet in project cassandra by apache.

the class SystemKeyspace method getPreviousVersionString.

/**
     * Try to determine what the previous version, if any, was installed on this node.
     * Primary source of truth is the release version in system.local. If the previous
     * version cannot be determined by looking there then either:
     * * the node never had a C* install before
     * * the was a very old version (pre 1.2) installed, which did not include system.local
     *
     * @return either a version read from the system.local table or one of two special values
     * indicating either no previous version (SystemUpgrade.NULL_VERSION) or an unreadable,
     * legacy version (SystemUpgrade.UNREADABLE_VERSION).
     */
private static String getPreviousVersionString() {
    String req = "SELECT release_version FROM system.%s WHERE key='%s'";
    UntypedResultSet result = executeInternal(format(req, SystemKeyspace.LOCAL, SystemKeyspace.LOCAL));
    if (result.isEmpty() || !result.one().has("release_version")) {
        // from there, but it informs us that this isn't a completely new node.
        for (File dataDirectory : Directories.getKSChildDirectories(SchemaConstants.SYSTEM_KEYSPACE_NAME)) {
            if (dataDirectory.getName().equals("Versions") && dataDirectory.listFiles().length > 0) {
                logger.trace("Found unreadable versions info in pre 1.2 system.Versions table");
                return UNREADABLE_VERSION.toString();
            }
        }
        // no previous version information found, we can assume that this is a new node
        return NULL_VERSION.toString();
    }
    // report back whatever we found in the system table
    return result.one().getString("release_version");
}

Example 44 with UntypedResultSet

use of org.apache.cassandra.cql3.UntypedResultSet in project cassandra by apache.

the class SystemKeyspace method isViewBuilt.

public static boolean isViewBuilt(String keyspaceName, String viewName) {
    String req = "SELECT view_name FROM %s.\"%s\" WHERE keyspace_name=? AND view_name=?";
    UntypedResultSet result = executeInternal(format(req, SchemaConstants.SYSTEM_KEYSPACE_NAME, BUILT_VIEWS), keyspaceName, viewName);
    return !result.isEmpty();
}

Example 45 with UntypedResultSet

use of org.apache.cassandra.cql3.UntypedResultSet in project cassandra by apache.

the class SystemKeyspace method getSSTableReadMeter.

/**
     * Returns a RestorableMeter tracking the average read rate of a particular SSTable, restoring the last-seen rate
     * from values in system.sstable_activity if present.
     * @param keyspace the keyspace the sstable belongs to
     * @param table the table the sstable belongs to
     * @param generation the generation number for the sstable
     */
public static RestorableMeter getSSTableReadMeter(String keyspace, String table, int generation) {
    String cql = "SELECT * FROM system.%s WHERE keyspace_name=? and columnfamily_name=? and generation=?";
    UntypedResultSet results = executeInternal(format(cql, SSTABLE_ACTIVITY), keyspace, table, generation);
    if (results.isEmpty())
        return new RestorableMeter();
    UntypedResultSet.Row row = results.one();
    double m15rate = row.getDouble("rate_15m");
    double m120rate = row.getDouble("rate_120m");
    return new RestorableMeter(m15rate, m120rate);
}