be/src/scheduling/cluster-membership-test-util.h

// Licensed to the Apache Software Foundation (ASF) under one
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// to you under the Apache License, Version 2.0 (the
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// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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// software distributed under the License is distributed on an
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#pragma once

#include "gen-cpp/StatestoreService_types.h"
#include <string>

namespace impala {
class ExecutorGroup;

namespace test {

/// Convert a host index to a hostname.
std::string HostIdxToHostname(int host_idx);

/// Convert a host index to an IP address. The host index must be smaller than 2^24 and
/// will specify the lower 24 bits of the IPv4 address (the lower 3 octets).
std::string HostIdxToIpAddr(int host_idx);

/// Various methods to build a new backend descriptor. 'idx' is used to determine its name
/// and IP address and the caller must make sure that it is unique across sets of hosts.
/// To create backends on the same host, an optional port offset can be specified.
///
/// Make a backend descriptor for group 'group_desc'.
TBackendDescriptor MakeBackendDescriptor(
    int idx, const TExecutorGroupDesc& group_desc, int port_offset = 0);

/// Make a backend descriptor for 'group'.
TBackendDescriptor MakeBackendDescriptor(
    int idx, const ExecutorGroup& group, int port_offset = 0);

/// Make a backend descriptor for the default executor group.
TBackendDescriptor MakeBackendDescriptor(int idx, int port_offset = 0);

}  // end namespace test
}  // end namespace impala